单选题：There is a file with 100 data blocks. Suppose that the file cont

There is a file with 100 data blocks. Suppose that the file control block, and the index block if necessary, stays in memory. For the operation inserting after the 45th block, ____takes the longest.@[A](1)
A. contiguous allocation
B. linked allocation
C. single level index allocation
D. multi-level index allocation





A.contiguous allocation
B.linked allocation
C.single level index allocation
D.multi-level index allocation


答案：A