问题如下：
Giorna Booa，an investment firm in the United States. Once the recommendation changes have been announced, it always starts trading for its own account immediately. It is likely that this firm violates the Code and Standards?
选项：
A. No, the firm can trade for its own account any time.
B. Yes.
C. No, the firm can trade before its clients.
解释：
B is correct.
According to Standard III(B) Fair Dealing, the company must give its clients enough time to take action based on their recommendations or changes.
老师，该行为最可能违反的是priority of transaction吧？其次可能违反fair dealing？谢谢。