股东最重要的义务是( )。

A．缴纳出资义务

B．以出资额为限对公司承担责任

C．遵守公司章程

D．忠诚义务

The author's purpose is to ______.

A．give the basic facts of marriage in North America

B．explain the reasons why the divorce rate is high in North America

C．introduce why both husband and wife have to work outside their home

D．give a picture of family structural change in North America