Referring to the exhibit, why is this OSPF adjacency remaining in this state?

Question

Exhibit

Options

• AA subnet mask mismatch exists between the OSPF neighbors.
• BAn MTU mismatch exists between the OSPF neighbors.
• CA hello interval mismatch exists between the OSPF neighbors.
• DAn area ID mismatch exists between the OSPF neighbors

• A
  10% (3)
• B
  73% (22)
• C
  3% (1)
• D
  13% (4)

Explanation

OSPF stuck in ExStart is mainly related to mismatched MTU. It could also be caused by a firewall filter on the loopback interface, but this is not an alternative.

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