All of the following are violations of Standard Ⅲ (B), Fair Dealing, EXCEPT a member:（）
A. places a trade for her discretionary accounts before placing a trade for her non-discretionary accounts.
B. places a trade for the firm account before issuing a buy recommendation.
C. telephones clients in distant cities the day after a buy recommendation is mailed to all clients because their mail service is later than the member’s local clients.
参考答案：C
解析：
Standard Ⅲ (B) states, "Members shall deal fairly and objectively with all clients and prospects when providing investment analysis, making investment recommendations, taking investment action, or in other professional activities. "
The term "fairly" implies that members should take care not to discriminate against a client when disseminating investment recommendations. All the responses, except for the telephoning of distant clients (which has the effect of putting them in the same position as local clients), describe a situation in which a client or group of clients is receiving preferential or detrimental treatment that is unfair.