Refer to the exhibit. R2 is unable to access the 172.16.1.0/30 network between R1 and R3.
Which option is a possible reason for the failure?
A. The seed metric for redistributing into RIP on R3 is missing.
B. The OSPF processes on R2 and R3 are different.
C. Auto-summary is misconfigured under the RIP process of R3.
D. The subnet mask on the link between R2 and R3 is smaller than /30.
E. The wildcard mask on R3 is misconfigured.
