When Isaac Was Looking for Advice on Selling Techniques,he Was

When Isaac was looking for advice on selling techniques,he was worried that his prospects were just not believing his factual statements and this was hurting his sales.Nancy didn't know what to say.Which of the following pieces of advice would you give him?

A) talk about FABs
B) say it with a straight face
C) give the prospect an actual demonstration
D) use a metaphor
E) use a trial close