A file system has been created on a logical volume spanning multiple LUNs During a backup, high latency is observed on the LUNs but only on one LUN at a time. The MOST likely cause for the problem is which of the following?

A.
The file system is not spread across enough physical spindles.

B.
The partitions of the logical volume were concatenated.

C.
The file system is being used by other applications.

D.
There is too much I/O activity on the physical disks from other applications