You are the Cisco Network Designer in Cisco.com. Which of these practices should you follow when designing a Layer 3 routing protocol?（）

• A、Never peer on transit links.
• B、Build squares for deterministic convergence.
• C、Build inverted U designs for deterministic convergence.
• D、Summarize routes at the distribution to the core to limit EIGRP queries or OSPF LSA propagation.