Which of the Following Statements Lists a Reason Why an Advertiser

Which of the following statements lists a reason why an advertiser should use outdoor advertising?

A) With outdoor advertising,audience demographics are easy to measure.
B) Outdoor advertising offers the lowest cost per exposure when compared to any major advertising media.
C) Outdoor messages are influenced by their environment.
D) As a communication channel,outdoor advertising provides a fleeting message.
E) There is a six-to eight-week lead time required for outdoor advertising.