OSPF Adjacency Requirements,
The devices must be in the same area.
The devices must have the same authentication configuration.
The devices must be on the same subnet.
The devices hello and dead intervals must match.
The devices must have matching stub flags.
Two OSPF routers with the same router-id WILL NEVER become neighbors. OSPF router-id is specific to that router and usually configured as a Lo interface
C, D is correct because " must match to successfully establish neighbor relationships" are the only ones, the answer A is not correct although certainly the RouterIDs must be different too.
You are right, the only parameters that must match are the rouetr area and the hello intervals. the rest of the parameters must be unique in each switch.
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