Last year a chain of fast-food restaurants, whose menu had always centered on hamburger, added its first vegetarian sandwich, much lower in fat than the chain’s other offerings. Despite heavy marketing, the new sandwich accounts for a very small proportion of the chain’s sales. The sandwich’s sales would have to quadruple to cover the costs associated with including it on the menu. Since such an increase is unlikely, the chain would be more profitable if it dropped the sandwich.
Which of the following, if true, most seriously weakens the argument?
A) Although many of the chain’s customers have never tried the vegetarian sandwich,
in a market research survey most of those who had tried it reported that they were very satisfied with it. ------> Another market research surveys may contradict to this report
B) Many of the people who eat at the chain’s restaurants also eat at the restaurants of competing chains and report no strong
preference among the competitors. -----> Irrelevant information to this agruement
C) Among fast-food chains in general, there has been little or no growth in hamburger
sales over the past several years as the range of competing offerings at other restaurants has grown. -------->previous data of no growth don't weak future growth because customers preference may change dramatically
D) When even one member of group of diner’s is a vegetarian or has a preference for low-fat food, the group tends to avoid restaurants that lack vegetarian or low-fat menu options. ........>
CORRECT.This information shows how one customer with low fat food preference can pull other customers to the restaurant,increasing sales of the restaurant
E) An attempt by the chain to introduce a lower-fat hamburger
failed several years ago, since it attracted few new customers and most of the chain’s regular customers greatly preferred the taste of the regular hamburger...... INCORRECT as answer choice C.