Billy Witz Sells Vacuum Cleaners Door-To-Door

Billy Witz sells vacuum cleaners door-to-door.After showing Mrs.Davis several models and demonstrations,Billy can tell she is hesitant but interested.Which trial closing is Billy likely to use to ensure a sale?

A) "Here's my card.Give me a call if you would like to place an order."
B) "Will you be placing an order,Mrs.Davis?"
C) "Do you want the standard model,or the one with the special options package?"
D) "Shall I give you a week to consider the offer?"
E) "I'll put you down for the deluxe model.Is that your natural hair color?"