Which of the Following Is Not Part of the Duties

Which of the following is not part of the duties of an agent to his principal?

A) to obey the principal's instructions except where they conflict with the law
B) to see that "apparent" is the same as "actual" authority
C) to delegate agent duties when he is unable to perform himself
D) to place the interest of the principal above all else except the law
E) to use care, skill, competence, and diligence, at all times