单选题：If a semaphore has been initialized with 2 and its current value

If a semaphore has been initialized with 2 and its current value is -3, there are _________ process(es) waiting for this semaphore.@[A](1)
A. 3
B. 2
C. 1
D. 0




A.3
B.2
C.1
D.0


答案：A