Which of the Following Is True of a Subagent's Duties

Which of the following is true of a subagent's duties to a principal?

A) A subagent does not owe the agent any of the duties that agents owe their principals.
B) A subagent who knows of the original principal's existence also owes that principal all the duties agents owe their principals.
C) The agent who appoints the subagent is not liable to the original principal when he/she is harmed by the subagent's conduct.
D) A subagent owes the original principal for duties arising solely from the original principal's contract with the agent.