Sheria, CFA, just joined an investment fir

问题：

Sheria, CFA, just joined an investment firm and reports directly to Raymond, who heads the department dealing with advisory service to high net worth individuals. To fulfill her duty of informing her employer about following AIMR Code of Ethics and Standards of Professional Conduct, Sheria must inform: （）

A. the firm’s chief executive officer either orally or in writing.

B. her direct supervisor orally about AIMR’s requirements.

C. her direct supervisor in writing about AIMR’s requirements.