问题如下：
Andrews, a private wealth manager, is conducting interviews for a new research analyst for his firm. One of the candidates is Wright, an analyst with a local investment bank. During the interview, while Wright is describing his analytical skills, he mentions a current merger in which his firm is acting as the adviser. Andrews has heard rumors of a possible merger between the two companies, but no releases have been made by the companies concerned. Which of the following actions by Andrews is least likely a violation of the Code and Standards?
选项：
A. Waiting until the next day before trading on the information to allow time for it to become public.
B. Notifying all investment managers in his firm of the new information so none of their clients are disadvantaged.
C. Placing the securities mentioned as part of the merger on the firm’s restricted trading list.
解释：
C is correct.
Answer The guidance to Standard II(A) –Material Nonpublic Information recommends adding securities to the firm’s restricted list when the firm has or may have material nonpublic information. By adding these securities to this list, Andrews would uphold this standard. Because waiting until the next day will not ensure that news of the merger is made public, answer A is incorrect. Negotiations may take much longer between the two companies, and the merger may never happen. Andrews must wait until the information is disseminated to the market before he trades on that information. Answer B is incorrect because Andrews should not disclose the information to other managers; no trading is allowed on material nonpublic information.
想请问下，为什么本题涉及的准则是II(A)material nonpublic information, 而不是V(A) Diligence and reasonable basis,即题中人物“没有对信息的真实性做深入研究”？