I arrived late and missed the flight. I ____ the traffic to be so heavy.

A．hadn’t expected

B．haven’t expected

C．wouldn’t expect

D．was expected

某企业发行长期债券4000万元，筹资费率为2%，债券利息率为12%，所得税税率为55%，则其资金成本率为( )。

A．12%
B．10%
C．5.5%
D．11%