Refer to the exhibit.

R2 is configured as the R1 neighbor in area 51, but R2 fails to receive the configured summary route.
Which action can you take to correct the problem?

A.
Replace the summary-address command with the area-range command.

B.
Configure a summary address under R1interface GigabitEthernet0/0.

C.
Configure a summary address under R1 interface GigabitEthernet1/0.

D.
Configure the no discard-route command in the OSPF process of R1.

E.
Configure ip ospf network broadcast under the Loopback0 interface of R1.