When a CFA Institute member suspects a client or a colleague of planning or engaging in ongoing illegal activities, which of the statements about the actions that the member should take is most correct According to the CFA Institute Standards of Professional Conduct, the CFA Institute member should:（）
A. consult counsel to determine the legality of the activity.
B. consult counsel to determine the legality of the activity and disassociate from any illegal or unethical activity if the member has reasonable grounds to believe that the activity is illegal or unethical.
C. ignore the suspected illegal activity unless the suspected party is a CFA Institute member.