Dad, you should tell Tom _________ with his friends.  [ ]

A. don't fight                  

B. don't to fight    

C. not fight                    

D. not to fight

上海证券交易所在进行配股操作时根据每个股东股票账户中的持股量，按照( )自动增加相应的股数并主动为其开立配股权证账户。

A．无偿送股比例

B．有偿送股比例

C．有效送股比例

D．约定送股比例