You are troubleshooting an OSPF adjacency that is stuck in the ExStart state.

What would be the correct step to resolve the problem?

A.
Look for a mismatched IP subnet or mask.

B.
Determine whether the neighbor is a DR-Other.

C.
Determine whether the hello and dead intervals are the same on both sides.

D.
Review the MTU settings to ensure that they match.

Explanation: