Which of the Following Is a Valid Claim When It

Which of the following is a valid claim when it comes to using the telephone to conduct business?

A) When using the telephone and voice mail, you lose a great deal of the visual richness that accompanies face-to-face conversation.
B) Your attitude and tone of voice can effectively convey your confidence and professionalism.
C) When you place phone calls, plan ahead so you'll be ready with relevant questions or information.
D) All of the above are valid.