According to the Textbook, What Did a Recent Survey of Secretaries

According to the textbook, what did a recent survey of secretaries, administrative assistants, and other gatekeepers conclude regarding the issue of salespeople making appointments with buyers?

A) Making an appointment communicates recognition that the seller's time is important.
B) Making an appointment is in everyone's interests in terms of time and territory management.
C) Making an appointment is no guarantee of gaining the prospect's undivided attention.
D) Making an appointment is a requirement of proper business etiquette.