It was _____back home after the experiments.

A．not until midnight did he go

B．until midnight that he didn’t go

C．not until midnight that he went

D．until midnight when he didn’t go

某企业本期息税前利润为200万元，本期实际利息费用40万元，该企业的财务杠杆系数为 ( )。

A．1.2

B．0.83

C．1.25

D．2.25