[单选题]
For years John Berger, a CFA charterholder and CEO of a company, relied upon a set of reasonable procedures for preventing violations of the Code and Standards of Professional Conduct in the firm. To not be liable for a violation of the Standards, Berger must:
A.Do nothing more than have the set of procedures in place as stated.
B.Periodically review the procedures.
C.Both periodically review the procedures and ensure the procedures are monitored and enforced.