In a Situation in Which There Is a Conflict of Interest

In a situation in which there is a conflict of interest between an agent who is authorized to make a certain transaction for a principal and the principal,the agent is allowed to:

A) engage in self-dealing transactions if the principal and the third party are unaware of the transactions.
B) compete with the principal regarding the agency business.
C) act as agent for both parties to a transaction without disclosing the double role to both principals.
D) act as a middleman and serve both parties to a transaction without notifying either principal.