A candidate or member is least likely violating the Standard regarding the confidentiality of client information if he shares confidential client information, when not required by law, with:

A) the CFA Institute Professional Conduct Program.
B) the client's attorney.
C) the co-owner of the client's account.

B) the client's attorney

Explanation:

Confidentiality of client is a very serious thing in the law sectors and it is highly frowned upon by various governments and individuals when such was bridged. There have been series of lawsuits filed by individuals when they felt that their non-disclosure of confidential information has been leaked.

In the case of a candidate or member, there is least likelyhood of violating the standard regarding to confidentiality of client information if he shares the client information with his or her attorney. This is because, before the client engages the attorney, he must have given the power of attorney to represent him or her in the legal lawsuit currently ongoing.

In trying to understand his client better and on what best approach to defend his client, he might request for some confidential information of his client regarding towards that case.

This, would less likely be violation of confidentiality of client information.

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