Which of the Following Is a Fundamental Principle of NACVA's

Which of the following is a fundamental principle of NACVA's Professional Standards?

A) Accept all assignments that can reasonably be completed within the time provided by clients.
B) Always do exactly what a client wants no matter what the circumstances.
C) Express an opinion with qualification that the member or a firm has financial interest or contemplated interest in the subject business.
D) Serve the client's interest by seeking to accomplish the objectives established with the client, while maintaining integrity and objectivity.