单选题：Assume that ,the page reference string as 2，1，3，4，2，1，5，6，2，1，3，

Assume that ,the page reference string as 2，1，3，4，2，1，5，6，2，1，3，7，6，3，2; the system has 3 frames and all 3 frames are initially empty.
Second chance(Clock) replacement will have ____page faults. @[D](1)
A. 11
B. 12
C. 13
D. 14




A.11
B.12
C.13
D.14


答案：D