Which of the following best describes the demand constraint placed on commercial banks?
A. The Fed demands that commercial banks sell loans to each other, creating the Federal Funds Market
B. Commercial banks demand that the securities they purchase be US government securities
C. Commercial banks demand that the securities they purchase be from security brokers (not directly from the US government)
D. Commercial banks demand that the loans they purchase from other commercial banks are either less risky or have higher interest rates