In a VNX series array, how does FAST VP manage data in a heterogeneous storage pool?

A.
Acts as an application accelerator and relocates LUNs based on performance

B.
Relocates more active data to faster drives and less active data to slower drives

C.
Relocates LUNs from one tier to another to improve performance

D.
Relocates more active data from Tier 1 storage without users noticing the difference