scott, an exclusive seller agency broker, is handling the listing of an apartment building for bob, a long-term client. vernon, a longtime client, is interested in buying the apartment building. scott explained to vernon that he cannot treat vernon as a client because of the firm's policy of exclusive seller agency. vernon agreed to continue with the transaction as a customer. does scott need to tell seller bob anything about his relationship with vernon? a) no, because vernon agreed to be treated as a customer. b) no, one advantage of nonexclusive single agency is full confidentiality.