Which of the Following Statements About Direct-Mail Advertising Is True

Which of the following statements about direct-mail advertising is true?

A) When FedEx delivers a sales letter from an office supply company to the mayor of a small town,it is not an example of direct-mail advertising.
B) Direct-mail advertising is the first-ranked advertising medium today.
C) When the U.S.Post office employee delivers a sales letter from an insurance company to the CEO,it is an example of direct-mail advertising.
D) Business reply mail is the most common form of direct-mail advertising.
E) Only large companies find direct-mail advertising to be an efficient way to reach target audiences.