单选题：consider a page-reference string for a process with m frames (in

consider a page-reference string for a process with m frames (initially all empty). The page-reference string has length p; n distinct page numbers occur in it. (Assume m < n )
The upper bound on the number of page faults is _____.@[C](1)
A. m
B. n
C. p
D. n+m
E. n-m
F. n+m-p



A.m
B.n
C.p
D.n+m
E.n-m
F.n+m-p


答案：C