单选题：The second-chance (clock) algorithm is an efficient approximatio

The second-chance (clock) algorithm is an efficient approximation technique for______.@[A](1)
A. LRU page replacement
B. LFU page replacement
C. benchmarking file system performance
D. benchmarking raw disk I/O performance





A.LRU page replacement
B.LFU page replacement
C.benchmarking file system performance
D.benchmarking raw disk I/O performance


答案：A