扫描二维码，直接登录
题库 / GMATLA-CR-122
Last August the XT chain of gasoline stations had a temporary sales promotion in effect in the promotion , any customer who made a purchase of ten or more gallons of gasoline was entitled to a free car wash . For the month of August , XT experienced a ten percent increase in gasoline sales as compared to sales in August the previous year so evidently the promotion was successful as a means of boosting sales.
In evaluating the argument , it would be most helpful to answer which of the following ?
In the areas in which XT's gasoline stations operate , how did total combined gasoline sales for all gasoline stations last August compare with sales for the previous August?
Was the money that XT earned from the increase in gasoline sales enough to offset the cost of providing tree car washes during the promotion?
Were there any customers who bought ten or more gallons at an XT gasoline station during the promotion who would have bought ten or more gallons at an XT gasoline in lower quantities , but more frequently ,if the promotion had not been in effect?
Did XT or any or its gasoline stations have to pay other businesses to provide the car washes that customers were offered in the promotion?
Are XT's gasoline sales in August usually significantly higher than one twelfth of XT's annual gasoline sales ?
因果结论基于比较逻辑得出。比较的是XT (last Aug vs. Aug of previous year), promotion (yes vs. no), sales (more vs. less)。结论：promotion -> sales growth。因果结论要成立，assume了1. 发生的先后顺序，2.相关性，3.非他因。看哪个选项通过比较逻辑推导出相关性和非他因。选项全部都是比较逻辑，直接找相关性和非他因就好。A选项比较的是 XT's vs. all stations' sales，时期与原文一致，可以否定相关性和/或非他因。登录 或 注册 后可以参加讨论