Which of the Following Statements About Telephone Prospecting Is True

Which of the following statements about telephone prospecting is true?

A) Telephone prospecting is less expensive than direct-mail prospecting.
B) Telephone prospecting allows for interaction between the lead and the caller.
C) Telephone prospecting is actually more expensive than the use of a canvassing sales force.
D) Telephone prospecting is also called electronic canvassing.
E) Telephone prospecting is one of the most inefficient methods of prospecting.