Which of the Following Is Correct with Regard to the Capacity

Which of the following is correct with regard to the capacity of an agent?

A) If an incompetent person who is not under guardianship appoints an agent, contracts made by that agent are voidable.
B) No mental capacity is necessary for an agent.
C) The incapacity of the agent disqualifies him from making a contract that is binding on his principal.
D) A young child or a person under guardianship has the capacity to act as an agent.