What is the most likely reason for the dispartly between the actual network numbers at the branches and the routes in the routing table on Gateway-Router?

What is the most likely reason for the dispartly between the actual network numbers at the branches and the routes in the routing table on Gateway-Router?

A.
Branch-Router2 is configured to send both RIPv1 and RIPv2 updates.

B.
Gateway-Router is configured to only receive RIPv2 updates.

C.
Gateway-router is configured to receive only RIPv1 updates.

D.
Branch-Router1 is configured to only send RIPv1 updates