In order to _____ the requirements of the International Olympic Committee, Beijing has set up a lot of new

facilities. [ ]

A. realize

B. answer

C. meet

D. gain

净室软件工程通过使用称为盒结构规约的方法来遵从操作分析原则，有三种盒类型，分别是 (28) 。

A．黑盒、状态盒、清晰盒

B．黑盒、白盒、灰盒

C．白盒、清晰盒、黑盒

D．灰盒、状态盒、黑盒