What does the Reserved Capacity parameter for a VMAX3 Storage Resource Pool (SRP) reserve?

A.
Percentage of SRP for thin device host allocations

B.
Percentage of SRP for TimeFinder SnapVX snapshots

C.
Absolute capacity in GB for SRDF/A DSE

D.
Absolute capacity in GB for thin device host allocations

Explanation:
http://uk.emc.com/collateral/technical-documentation/docu55786-vmax3-service-level-pro-fullyautomated-storage.pdf (page 27)