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

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

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.
Manipulate the reference bandwidth.