To Avoid Being Bound by the Acts of the Agent

To avoid being bound by the acts of the agent after the agency has ended,the principal:

A) should give actual notice to those who have dealt with the former agent.
B) should give constructive notice to those who have dealt with the former agent.
C) should give verbal notice if the termination is due to loss of legal capacity by the principal.
D) should give actual notice if the termination is due to impossibility of performance.