下列各项中，适用于代理的情形是( )。

A．证券公司代客户买卖股票
B．收养子女行为
C．服装公司根据客户的要求代客户加工服装
D．证券公司代股份有限公司发行股票

Quality is achieved when （）.

A．the requirements have been met

B．customer expectations have been exceeded

C．the customer indicates acceptance of the product or service

D．the customer stops asking for additional features