18. Critics of sales seminars run by outside consultants point out that
since 1987, revenues of vacuum cleaner companies whose employees attended
consultant-led seminars were lower than revenues of vacuum cleaner
companies whose employees did not attend such seminars. The critics charge
that for vacuum cleaner companies, the sales seminars are ill conceived
and a waste of money. Which of the following, if true, is the most effective challenge to the
critics of sales seminars? (A) Those vacuum cleaner companies whose sales were highest prior to 1987
are the only companies that did not send employees to the seminars. (B) Vacuum cleaner companies that have sent employees to sales seminars
since 1987 experienced a greater drop in sales than they had prior to
1987. (C) The cost of vacuum cleaner sales seminars run by outside consultants
has risen dramatically since 1987. (D) The poor design of vacuum cleaner sales seminars is not the only
reason for their ineffectiveness. (E) Since 1987, sales of vacuum cleaners have risen twenty percent. 请问答案A怎么解释? 怎么这么别扭,好像说倒了. 多谢各位NN! |