Which Cisco router platform should the service provider implement as the managed CE device?

A service provider needs to implement a managed CE device that supports Cisco IOS ISSU, and
the current CE support staff is highly trained in Cisco IOS only. Which Cisco router platform should
the service provider implement as the managed CE device?

A.
Cisco ASR1K

B.
Cisco ISR-G2

C.
Cisco ASR9K

D.
Cisco 12000 GSR

E.
Cisco 7200

F.
Cisco 7600

Explanation: