What is the significance of RIB groups, as shown in the exhibit?

Click the Exhibit button. What is the significance of RIB groups, as shown in the exhibit?

A.
RIB groups alter the multicast RPF check table to inet.0.

B.
RIB groups alter the multicast RPF check table to inet.2.

C.
RIB groups alter the multicast RPF check table to inet.4.

D.
RIB groups alter the multicast RPF check table to inet.3.