GMAT Critical reasoning 오답노트 (6) weakening

1. 해설: 제발 문제좀 읽자. 특히 Except! 몇번째니..

The cost of transatlantic airfare has nearly doubled over the past five years, yet airlines are doing a booming business. Clearly, people today have more money to spend on vacations than they did five years ago.

All of the following, if true, would weaken the argument above EXCEPT:

		Most people buying transatlantic tickets today use them for business trips, so airfare is refunded by their companies.
		There are fewer airlines in existence today than five years ago.
		People are taking shorter vacations and staying in cheaper hotels than they used to.
		Crossing the Atlantic by ship requires more time than most people can afford.
		Domestic airline flights have seen a steady increase in passengers.

             -> 유일하게 결론을 바꾸지 못하는 답. It shows more booming business and vacation money. 

At Food World Supermarket, built in 1975, the number of successful thefts has risen dramatically in the last few months. (evidence) Food World has a reliable electronic security system at all customer exit doors, and this system is always in operation. Therefore, (conclusion) the thefts must have been committed by people who used exits other than the regular customer exit doors.

Assumption: the exits that are equipped with a reliable security system are not breakable by thefts.  

Which of the following is an assumption that would make the conclusion above logically correct?

		If a surveillance system is installed in a supermarket, it is always equipped at every possible exit.
		If an employee so wishes, he is allowed to leave through an exit that is not monitored by surveillance equipment.
		If a store has a reliable security system, it is impossible to pass through the system undetected.
		If a supermarket was built before 1980, it often has exits that cannot be equipped with electronic surveillance.
		If a store has a reliable electronic security system but is still experiencing a rise in theft, it must be the case that the employees are stealing.

Our local baseball team needs our support. Ever since the new soccer franchise was established in our city, our local newspaper, (evidence) the Constitution-Herald, has reduced its coverage of baseball. Clearly, (conclusion) the presence of the new soccer franchise is hurting the attendance at local baseball games.

The assumption must link the coverage in the newspaper to the conclusion.

Which of the following, if true, would most WEAKEN the argument above?

		The publisher of the Constitution-Herald is an avid baseball fan.
		All baseball teams in the country are showing reduced attendances.
		The owner of the local baseball franchise also owns the soccer franchise.
		Nearly all local fans who go to baseball games read the sports coverage only in the local paper Sport City.
		In general, newspaper readers prefer to watch basketball.

The World Automobile Association (WAA) publishes a list of the "Best and Worst Drivers of the World," ranking the drivers of every nation according to the number of traffic deaths per mile driven in that country.

Each of the following, if true, would by itself provide a logical objection to using the WAA's ranking as a representation of the quality of drivers in each nation EXCEPT:

		The roads in some countries are in bad repair and are therefore more dangerous than roads in other countries.
		The average driver in industrialized countries can afford to maintain his or her car in better condition than can the average driver in less developed countries.
		Some countries contain hundreds of thousands of miles of road while other countries contain relatively few miles of road. : just fact!
		Minor accidents that would cause little injury in many countries are often fatal when they occur in extremely mountainous countries.
		Because of differences in national economies, the average car in some countries contains many more passengers than does the average car in other countries.

The Kapoor Meatworks has a virtual monopoly on expensive, gourmet delicacies. In order to expand their market, they intend to offer a budget line of less costly delicacies. (evidence) Such a product is virtually unknown, and they realize that its success depends upon a heavy advertising campaign. They have decided to (conclusion) finance the advertising with the profits from their gourmet line.

Which of the following, assuming that each is a realistic possibility, would constitute the most serious obstacle to the Kapoor Meatworks' project?

		The introduction of a budget line of delicacies completely undercuts the sales of the gourmet line.
		At the start, the company spends more on advertising than it makes from sales of the budget line delicacies.
		When the budget line delicacies grow in popularity, competitors enter the budget delicacies market and Kapoor does not have a monopoly in that market.
		Many of the consumers who purchase the budget line are tempted to try the delicacies offered in the gourmet line.
		Many of the stores that now carry Kapoor's gourmet line of delicacies are exclusive, and refuse to carry their budget line.