单选题：Consider the following snapshot of a system:

Consider the following snapshot of a system:@[C](1)
```
Allocation Need Available
A B C A B C A B C
P0 0 1 0 7 4 3 3 3 2
P1 2 0 0 1 2 2
P2 3 0 2 6 0 0
P3 2 1 1 0 1 1
P4 0 0 2 4 3 1
```
Which one is the safe sequence for the system?
A. < P1, P2, P4, P3, P0 >
B. < P2, P0, P4, P1, P3 >
C. < P1, P3, P4, P2, P0 >
D. < P4, P3, P1, P2, P0 >



A.< P1, P2, P4, P3, P0 >
B.< P2, P0, P4, P1, P3 >
C.< P1, P3, P4, P2, P0 >
D.< P4, P3, P1, P2, P0 >


答案：C