When designing a large full mesh network running OSPF, how would you reduce LSA repetition?

When designing a large full mesh network running OSPF, how would you reduce LSA repetition?
A . Elect a DR and BD
C . Use access control lists to control outbound advertisements.
D . Choose one or two routers to re-flood LSA information.
E . Put each of the point-to-point links in your full mesh networking into a separate area.

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Answer: C