单选题：The testing technique that requires devising test cases to demon

The testing technique that requires devising test cases to demonstrate that each program function is operational is called __. @[A](1)

A. black-box testing
B. glass-box testing
C. grey-box testing
D. white-box testing




A.black-box testing
B.glass-box testing
C.grey-box testing
D.white-box testing


答案：A