Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Neighbor State Machine):
The ExStart state is where routers negotiate who will be the master during database exchange, based on router IDs.
If both routers have the same Router ID, the negotiation cannot proceed, causing the adjacency to be stuck in ExStart.
Thus, correct answer: C.
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Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Route Policies):
"Export policies control what routes the router advertises to neighbors. Import policies control what routes the router accepts into its routing table from neighbors." The goal is to reject the OSPF route learned from R2.
Since R1 is receiving routes via OSPF, an IMPORT policy is required.
Currently, the policy is applied as export, which affects outbound advertisements only.
Thus, correct answer is C

Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (RIP Redistribution):
RIP uses hop count as a metric, while OSPF uses cost.
When redistributing OSPF routes into RIP, you must assign a valid RIP metric (hop count) through policies or default metric settings.
If no metric is assigned, redistribution will fail or install unreachable routes (default RIP maximum is 16 hops).
Thus, correct answer: A.