Which of the Following Circumstances Is Not an Exception to the Rule

Multiple Choice

Which of the following circumstances is not an exception to the rule that an agent is not personally liable for liabilities incurred on behalf of the principal?

A) Where the doctrine of the undisclosed principle applies.
B) Where custom or usage establishes that the agent will be personally liable.
C) Where a tort has been committed by the agent.
D) Where there has been a breach of warranty of authority.