The Biggest Limitation of Using the Buyer Resolution Theory to Guide

The biggest limitation of using the buyer resolution theory to guide the sales process is:

A) there is no way to know in advance which one of the five questions will be harder for the customer to answer
B) the salesperson cannot always convince the buyer to answer the questions in the correct order
C) buyer resolution theory only applies to transactional sales,so more complicated sales processes don't conform to the theory
D) salespeople require too much training in buyer resolution theory to be able to use it with customers until they have been with their companies for several years
E) it only helps customers decide to buy,it doesn't help them decide not to buy