What types of questions should you ask your customers to get the best information about their
needs?

A.
open-ended questions that prompt the customer to provide better information about their needs

B.
personal questions to enable you to analyze the types of people they are

C.
financial questions to make sure they can afford your product

D.
questions that require yes or no answers to keep the question and answer period brief

Explanation:
Reference:http://www.wikihow.com/Ask-Open-Ended-Questions