If You Can't Be Sure Which Medium Will Be Best

Multiple Choice

If you can't be sure which medium will be best to convey your persuasive message to a diverse audience,you should

A) choose the one that is most economical.
B) select the one that is easiest to use (such as email) .
C) use two or more, such as following up an email campaign with printed letters.
D) choose one at random and see how well it works.
E) not send the message.