Ann and Bill are brokers working under the supervision of the same principal broker, Sue. Ann has a listing on a property, bill represents buyer who has made an offer on the same property. Sue must?

A: advocate on behalf of both the seller or the buyer.

B: Disclose confidential information to both the buyer and the seller.

C: Supervise Ann and Bill in fulfilling their duties and obligations to their respective clients.

D: Ensure Ann and Bill have disclosed that each of them are the disclosed limited agent in the transaction.