In the Context of a Buyer-Seller Relationship, Which of the Following

In the context of a buyer-seller relationship, which of the following statements is true of trust?

A) The seller always defines trust in the relationship.
B) It was more important in traditional selling than it is in today's relationship selling.
C) A salesperson has to determine what trust means to each of his or her buyers.
D) It is earned when a salesperson believes that a customer will make a purchase.
E) It is unrelated to the concept of referral.