Giselle Holt is a staff of the Professional Conduct Program of CFA Institute. In order to be compliance with the Code of Ethics and Standards of Professional Conduct, Holt is most directly responsible for which of the following activities（）
A. conducting investigations on CFA members or candidates who may have violated the Code of Ethics and Standards of Professional Conduct.
B. conducting hearing panel relating to proposed sanctions on CFA members or candidates.
C. updating the code of ethics and the professional conduct annually to ensure they are effective.
