How does host file system defragmentation of pool LUNs affect VNX performance?

A.
Causes heavy loading of cache and back-end ports and may result in a decrease in system performance.

B.
Does not cause additional VNX system load and will not affect system performance.

C.
Causes heavy loading of cache and front-end ports and may result in a decrease in system performance.

D.
Reduces loading of cache and back-end ports and may result in an increase in system performance.