As CFA members, when they dealing with the investment service for his or her clients and employer, which of the following statements is most accurate according to the Standards of Professional Conduct relating to loyalty, prudence and care（）
A. CFA members must place their clients' and employers' interests before their own clients' interests.
B. CFA members must place their employers' interests before their own interests.
C. CFA members must place their clients' interests before their employers' or their own interests.
