单选题：A disk system uses the SSTF scheduling algorithm to manage the d

A disk system uses the SSTF scheduling algorithm to manage the disk. Suppose there is a disk request queue with requests on cylinder 27, 136, 58, 100, 72, 40 in order, and the current disk head is at cylinder 80. Then the total head movement is _____ cylinders. @[D](1)
A. 80
B. 136
C. 167
D. 162





A.80
B.136
C.167
D.162


答案：D