Your customer needs help understanding Unisphere statistics on a VNX, specifically the Number of Write Cache Pages. How do you explain this metric to the customer?

A.
It is displayed per each SP, and the total number is derived from the sum of both SPs.

B.
It is displayed per entire array, and the total number is half the sum of both SPs.

C.
It is displayed per each SP, and the total number is four times the sum of both SPs.

D.
When FAST Cache is enabled, the number includes the FAST Cache plus the sum of both SPs.