What are two characteristics of VRF instance?

What are two characteristics of VRF instance? (Choose two.)
A. All VRFs share customers routing and CEF tables .
B. An interface must be associated to one VRF.
C. Each VRF has a different set of routing and CEF tables
D. It is defined by the VPN membership of a customer site attached to a P device.
E. A customer site can be associated to different VRFs