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