What is the granularity of FAST data movement requests in a VMAX3 array?

A.
1 Extent Group

B.
1 Extent Group Set

C.
12 Extents

D.
42 Extent Groups

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