Which supplicant(s) and server(s) are capable of supporting EAP-CHAINING?

Which supplicant(s) and server(s) are capable of supporting EAP-CHAINING?
A . Cisco AnyConnect NAM and Cisco Identity Service Engine
B . Cisco AnyConnect NAM and Cisco Access Control Server
C . Cisco Secure Services Client and Cisco Access Control Server
D . Windows Native Supplicant and Cisco Identity Service Engine

Answer: A