– The kidnapped American captain was rescued from the Somali pirates（海盗）.

-- But for the help of the US Navy, he _______ freed then.

A．may not be

B．wouldn’t have been

C．wouldn’t be

D．mustn’t have been

某公司预计六个月后收到货款1000万美元，假设现在的汇率为1美元兑6.8元人民币。该公司预测人民币会升值，为了防止风险，该公司同银行进行协商，将六个月后换汇的汇率固定为1美元兑6.7元人民币，这属于( )。

A．货币远期合同

B．货币期权

C．利率期货

D．货币互换