What are two advantages of using Cisco FEX devices in the data center design? (Choose two.)

A.
Traffic-forwarding decisions are made by the Cisco FEX device.

B.
Cisco FEX devices must be upgraded when the parent switch is upgraded.

C.
Traffic-forwarding decisions are made by the parent switch, resulting in easier troubleshooting and centralized management.

D.
Cisco FEX devices do not have to be upgraded when the parent switch is upgraded, resulting in cost savings.

E.
Cisco FEX devices can be part of two different VDCs.