Refer to the exhibit. Which configuration issue is preventing the OSPF neighbor relationship from being established between the two routers? 

Answer options:

A. R1 has an incorrect network command for interface Gi1/0.
B. R2 should have its network command in area 1.
C. R1 interface Gi1/0 has a larger MTU size.
D. R2 is using the passive-interface default command.

C