单选题：A counting semaphore was initialized to 10. And 28 wait operatio

A counting semaphore was initialized to 10. And 28 wait operations and 18 signal operations were completed on this semaphore. Assume the resulting value of the semaphore is 0. Then 3 more signal operations occur. How many waiting processes are there?@[A](1)
A. 0
B. 2
C. 3
D. 6





A.0
B.2
C.3
D.6


答案：A