English Skills with Readings 7th Edition by John Langan

Exercise 16

Which sentence best expresses the selection's main point
A) Americans are bombarded by various compliance techniques, the dangers of which can be overcome through understanding and legislation.
B) Fearful of the effects of political attack ads, critics are calling for strict limits on such ads.
C) With more and more messages demanding our attention, we find it harder and harder to consider any one subject really thoughtfully.
D) The persuasion researcher Robert Cialdini spent a three-year sabbatical learning the tricks taught in dozens of sales training programs.