What is the maximum number of SRDF groups that can be configured?

You are configuring SRDF in a DMX-2 running Enginuity 5671. What is the maximum number of
SRDF groups that can be configured?

A.
16 ranging from A to P

B.
32 ranging from 00 to 1F

C.
64 ranging from 00 to 3F

D.
128 ranging from 00 to 7F