Which of the Following Would MOST Weaken the Argument for a Company

Which of the following would MOST weaken the argument for a company continuing with direct mail marketing?

A) It would have to use highly selective mailing lists to ensure that its messages reach the target audience.
B) Analysts are predicting a decline in the use of traditional forms of direct mail in coming years.
C) Competitors are starting to use more intrusive direct marketing techniques.
D) The effectiveness of direct mail marketing would have to be evaluated and monitored continuously in order to reduce costs.
E) In terms of per thousand people reached,mass media is much less expensive than direct mail marketing.