单选题：consider the following snapshot of a system:

consider the following snapshot of a system:
```
Allocation Max Available
A B C A B C A B C
P1 2 1 2 5 5 9 2 3 3
P2 4 0 2 5 3 6
P3 4 0 5 4 0 11
P4 2 0 4 4 2 5
P5 3 1 4 4 2 4
```
Which of the following statement is true if a request for process P5 arrives for (1, 1, 1)? @[A](1)
A. The request can be granted and one safe sequence is .
B. The request can be granted and one safe sequence is .
C. The request is larger than its maximum need and should be denied.
D. The system is unsafe if the request is granted.





A.The request can be granted and one safe sequence is .
B.The request can be granted and one safe sequence is .
C.The request is larger than its maximum need and should be denied.
D.The system is unsafe if the request is granted.


答案：A