单选题：Consider a system with 12 magnetic tape drives and three process

Consider a system with 12 magnetic tape drives and three processes: P0, P1, and P2. If the maximum needs and current holdings are as the following table, please choose one safety sequence to satisfy a safe state.@[B](1)
```
Process Max Allocation
P0 10 5
P1 4 2
P2 9 2
```

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




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


答案：B