Which Statement Best Reflects The"Responsibility to Clients" Section of NASP's

Which statement best reflects the"Responsibility to Clients" section of NASP's Standards of Professional Conduct?

A) I will serve as a model of good citizenship.
B) I will act with the highest degree of professionalism.
C) I will act in the best interest of my clients.
D) I will disclose potential conflicts of interest.
E) I will provide the lowest price.