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 lessons its effect.
B) increases the positive response to the message.
C) decreases the positive response to the message even 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 or less effective than when used alone.