Exam 200-120 Question id=136 Troubleshooting

What can cause two OSPF neighbors to be stuck in the EXSTART state?

A. There is a low bandwidth connection between neighbors
B. The neighbors have different MTU settings
C. The OSPF interfaces are in a passive state
D. There is only layer one connectivity between neighbors
E. EXSTART state is state of EIGRP not in OSPF

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