Research Indicates That Publicity Followed by Advertising with the Same

Research indicates that publicity followed by advertising with the same message

A) undermines the credibility of the first message and therefore lessens its effect.
B) increases the positive response to the message.
C) increases the retention of the message but only if it is delivered by a well-known spokesperson.
D) is less effective than publicity followed by a sales promotion, such as a contest or product sample.
E) is no more effective than either used alone.