Timothy Holt, CFA, is a portfolio manager for the Toro Aggressive Growth Fund, a large mutual fund with an aggressive-growth mandate in Fechtman Investments. While having lunch with his colleagues, Holt overheards the manager of Fechtman Investments' trading desk discussing a large sell order for shares of Samuel Corporation that will take the rest of this week to process. Samuel Corporation stocks take a dominant position in the Toro Aggressive Growth Fund. To protect his clients' interests, Holt immediately heads to his office and sells all the Samuel Corporation stocks held iii his fund. Has Holt most likely violated the Standards of Professional Conduct
A. No.
B. Yes, relating only to material nonpublic information.
C. Yes, relating both to material nonpublic information and priority of transactions.
，i是虚数单位，若（1+i）（1-bi）=a，则
的值为（）。