陈向东逻辑里的一题

As a promotional experiment, Omega Company distributed four million catalogs. In one of the two versions of the catalog, the description of each item for sale mentioned a “Made by Hand” label. The number of purchases from consumers receiving that catalog was twenty percent greater than the number of purchases from consumers receiving a catalog that did not mention the label. Thus, the mention of the label stimulated sales.

Which of the following, if true, could best be used to challenge the conclusion drawn above?

1. Consumers receiving the catalog mentioning the label had previously purchases items from Omega Company by mail but consumers receiving the other catalog had not.
2. Surveys showed that consumers returned purchased items to Omega Company during the promotional campaign at the same rate regardless of which catalog they received.
3. The number of purchases from Omega Company declined substantially after the promotional campaign was completed.
4. Omega Company mailed three times as many catalogs that did not mention the label as catalogs that mention the label.
5. Omega Company sold twenty percent fewer items during the year of the promotional campaign than it had during the previous year.

答案是A，我怎么觉得D也对呢？

这是一道反对类型的题目，呵呵。。先拽一下。

D选项仔细看应该是支持原文才对，想一想寄出的catalogs that not mention the label = 3 * catalogs that mention the label，而 purchases from cousumes receiving catalog that mention the label = 120% purchases from consumers receiving a catalog that no mention the label

假设寄出了四个catalogs，一个有label，其余三个没有label, 但收到有label的人中有80%都买了，而收到没有label的人中只有20%买了，这样虽然收到有label的人少了，但收到有label中的人购买的总数（80%）比收到没有label中的人购买总数（3*20%）高。更加支持了原观点increase sales 不知我说得对不对？

刚才又看了一下，CXD的翻译也这么说的——有“手工制造”标签的是没有的3倍。

3 times as many A as B 究竟怎么翻译呢？A是B的3倍？还是反过来？谢谢！