He accidentally _____ he had quarreled with his wife and that he hadn’t been home for a couple of weeks.

A．worked out

B．made sure

C．led to

D．let out

交通量按交通量特性的分类方法有哪些？（）

A、平均交通量

B、平均日交通量

C、高峰小时交通量

D、最高小时交通量