With regard to read cache utilization, which of the following statement is true?

A.
Read cache provides the best performance in random I/O environments.

B.
Turn off read caching on LUNs with very random read environments and/or sequential access.

C.
Read caching should never be turned off as it gives the best performance in all host-access situations.

D.
Wherever write cache is turned off read cache must also be turned off to balance out the workload of the CLARiiON.