Which of the following statements about financial markets and securities are true?

A．Many common stocks are traded over-the-counter, although the largest corporations usually have their shares traded at organized stock exchanges such as the New York Stock Exchange.
B．As a corporation gets a share of the broker’s commission, a corporation acquires new funds whenever its securities are sold.
C．Because of their short terms to maturity, the prices of money market instruments tend not to fluctuate wildly.
D．Only (a) and (c) of the above are true.