He ______ the test again, in which case, his mother will be very disappointed. 

A．might fail

B．must have failed

C．should fail

D．could have failed

下列各项中，会引起交易性金融资产账面价值发生变化的有( )。

A．交易性金融资产账面价值与公允价值的差额

B．部分出售交易性金融资产

C．确认分期付息债券利息

D．被投资单位宣告现金股利