When a disaster occurs, all people, ________ they are old or young, rich or poor, try their best to help those in need.

A．no matter

B．whether

C．however

D．even though

证券公司通过管理委员会、执行委员会等形式行使总经理职权的，其组成人员应当取得证券公司高级管理人员任职资格。