Which module is the Enterprise WAN module?

Refer to the exhibit.

Which module is the Enterprise WAN module?

A.
Enterprise A

B.
Enterprise B

C.
Enterprise C

D.
Enterprise D

E.
Enterprise E

F.
Enterprise F

Explanation:
WAN module consists of WAN link terminal devices, routers, firewalls, remote access services.
Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html#wp708780