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) increases the positive response to the message when it is delivered by a well-known spokesperson.
D) is less effective than publicity followed by a sales promotion with a similar theme.
E) is no more or less effective than when used alone.