Which of the Following Is the Best Advice When Making

Which of the following is the best advice when making business telephone calls?

A) The responsibility for ending a call lies with the person who receives the call, not the caller.
B) Before you make a call, ask yourself if it's necessary.
C) To sound natural and spontaneous, decide what you're going to say after the receiver answers.
D) Since the person you're calling can't see you, there's no need to smile.