Critical Reasoning

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.

OA is A. All other choices don' fit in, however, can someone explain to me in detail how OA is correct.

punitkaur wrote: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.

OA is A. All other choices don' fit in, however, can someone explain to me in detail how OA is correct.

E.g.
Company "X" Not attended seminar:
Company "Y" attended seminar:

prior 1987 Sales X > Y e.g. X=100 million Y=50 million
after 1987 Y sales increased by 50 milion .. Y=100 million
after 1987 X sales increased by 20 milion .. X=120 million
still Y<X but it's sales jumped by 100%... its not waste of money right?

If the companies who had high revenues never attended the seminar to begin with.. that clearly says why the critics are wrong....

only companies that are interested in increasng their revenue sent their employees to begin with.. hence the critics are wrong..because they fail to see that reasoning.