---What did your teacher say this morning?

--She asked me                 this morning.

A．how did Tom come to school

B．why was Tom late for school

C．when Tom would get to school

D．what will Tom do at school

（）指估计的某一债项违约后损失的金额占该违约债项风险暴露的比例，即损失占风险暴露总额的百分比。

A.效率比率

B.杠杆比率

C.违约损失率

D.违约概率