John's success has nothing to do with good luck. It is years of hard work _____ has made him what he is today. [ ]

A. why

B. when

C. which

D. that

下列项目中，纯利率不受( )影响。

A．通货膨胀

B．违约风险

C．货币供求关系

D．流动性风险

E．期限风险