Which of the Following Should Be Done by a Salesperson

Which of the following should be done by a salesperson before meeting a prospect?

A) He or she should call the prospect and state the price of the concerned product or service.
B) He or she should call the prospect and ask for an order.
C) He or she should send the qualified prospect a sales letter.
D) He or she should gather basic information about the prospect.
E) He or she should request a referral or letter of introduction from the prospect.