Which statement is correct about Cisco Catalyst 6500 E-Series Switches?

A.
They do not support CEF720 line cards.

B.
All their FRUs are compatible with older Catalyst 6500 chassis.

C.
They require different Cisco IOS code trains than older Catalyst 6500 chassis.

D.
They support all existing supervisors, line cards, switch fabrics, and software releases.