With his wife talking endlessly about his this and that, it is quite _______ for him to lose his temper.

A．common

B．normal

C．ordinary

D．usual

商业银行董事会负责本行资本充足率的信息披露，未设立董事会的，由（）负责。

A.执行董事

B.董事会指定人员

C.行长或行长授权人员

D.行长