During an Organized Sales Dialogue (Presentation),a Salesperson's Ability to Propose

During an organized sales dialogue (presentation) ,a salesperson's ability to propose and develop a customized solution is heavily dependent upon:​

A) ​the salesperson's ability to listen and speak convincingly during needs discovery.
B) the salesperson's spelling and grammar, and ability to speak convincingly.
C) ​a buyer's ability to uniquely articulate his or her problems and needs.
D) ​the salesperson's ability to uniquely address a buyer's problems and needs.
E) ​the salesperson's ability to persuade a prospect or customer to make a purchase.