单选题：Consider a system with a memory-access time of 100 nanoseconds a

Consider a system with a memory-access time of 100 nanoseconds and an average page-fault service time of 25 milliseconds.If one access out of 1000 causes a page fault, the effective access time is approximately __________ nanoseconds.@[A](1)
A. 25000
B. 250000
C. 125000
D. 100000





A.25000
B.250000
C.125000
D.100000


答案：A