Which two design recommendations are most appropriate when OSPF is the data center core routing protocol? （）

• A、Never use passive interfaces.
• B、Use NSSA areas from the core down.
• C、Use totally stub areas to stop type 3 LSAs.
• D、Use the lowest Ethernet interface IP address as the router ID.
• E、Tune OSPF timers to enable OSPF to achieve quicker convergence.