Answer: Mary and Sue may act as dual agents.
Step-by-step explanation:
Mary and Sue work for the same firm. Therefore, they cannot be single agents. The relationships formed will be either dual agency or designated agency. However, under the law of designated agency, a broker-in-charge cannot be a designated agent with a provisional broker whom they are required to supervise. When a BIC and a provisional broker are representing parties in the same transaction they will always be dual agents.