Theresa Green, CFA, manages the portfolio of Ian Knowlden, a client of Tisbury Investments. Green knows that Knowlden is preparing to sell a large position in the Franklin Industries, a relatively small inactively-traded stock listing in a local exchange. Green places a sell order for Franklin Industries in his own account before the Knowlden's order is placed. Green has most likely violated the Standard(s) of Professional Conduct relating to:（）
A. only material non-public information.
B. only priority of transactions.
C. both material nonpublic informationand priority of transactions.
