Which of the Following Statements Is True About Response Time

Which of the following statements is true about response time?

A) Response time is the time between when a salesperson sends a message and when the prospect responds to it.
B) E-mails have a greater degree of interactivity and a faster response time than telephone communication.
C) A salesperson should use fax rather than telephone communication because it has a shorter response time.
D) Face-to-face communications have the slowest response time of all communications methods because of nonverbal communications.
E) Response time is the time when a prospect is most receptive of the sales message because of the absence of noise.