Suppose you receive a telephone call from a high-level executive while in the middle of a conversation with someone in your office or cubicle. what is the proper response? a. say, "can you hold? i'm in the middle of something." b. take the call and indicate to the person in your presence to wait. c. ask the caller if he or she would like to be transferred to someone else. d. say, "i have someone in my office right now. may i return your call in a few minutes? "