单选题：Consider the following snapshot of a system:

Consider the following snapshot of a system: @[D](1)

```
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 correct?
A. The system is unsafe.
B. The system is safe and one safe sequence is .
C. The system is safe and one safe sequence is .
D. The system is safe and one safe sequence is .




A.The system is unsafe.
B.The system is safe and one safe sequence is .
C.The system is safe and one safe sequence is .
D.The system is safe and one safe sequence is .


答案：D