10) Which of the following instruments are traded in a capital market?
A. Banker's acceptances
B. U.S. Government agency securities
C. Negotiable bank CDs
D. Repurchase agreements

如题，为什么只有美国ZF证券可以在市场交易？我觉得回购协议，大额可转让存单还有银行承兑的汇票都是可以交易的啊。