Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

An investment banking department of a brokerage firm often receives material nonpublic information that could have considerable value if used in advising the firm’s brokerage clients. In order to conform to the Code and Standards, which one of the following is the best policy for the brokerage firm?
Option A:Permanently prohibit both “buy” and “sell” recommendations of the stocks of clients of the investment banking department.
Option B:Establish physical and informational barriers within the firm to prevent the exchange of information between the investment banking and brokerage operations.
Option C:Monitor the exchange of information between the investment banking department and the brokerage operation.

Answer: B