Anton Has Determined the Facts in His Customer's Complaint

Anton has determined the facts in his customer's complaint.His next step should be to:

A) follow through with the action he has chosen to solve his customer's problem.
B) listen to the customer without interrupting when the problem is being described the first time.
C) offer a solution and gain agreement that the proposed solution is acceptable.
D) discuss how another member of the selling center is actually at fault.
E) determine whether his firm or the customer's firm is responsible for the problem.