To Become a Truly Professional Salesperson, You Must Be Able

To become a truly professional salesperson, you must be able to close under fire.What does the expression "close under fire" mean to a salesperson?

A) ignore the prospect's objections and ask for the order anyway
B) shift the burden of proof to the prospect
C) deal with interruptions and "keep on selling"
D) ask for the order even when the prospect is in a bad mood
E) ask the prospect to increase his or her order even when the prospect doesn't need additional products