According to the Text,which of the Following Statements About On-Line

According to the text,which of the following statements about on-line sales promotions is true?

A) There is no way for a marketer to build long-term,mutually beneficial relationships with customers on-line.
B) Internet sales promotions are more effective and cost efficient at generating responses than their offline counterparts.
C) One of the few types of sales promotion that cannot be used on-line is sampling.
D) Loyalty marketing programs are ineffective when used at websites to encourage traffic.