Which statement describes the remote sites in a Cisco Single-Site Secure Network Foundation solution with remote teleworkers?

A.
They use public IP addresses that are routable through the Internet.

B.
They are part of the VLANs at the central site; they are in the same subnets.

C.
They are in separate subnets but are part of the private address space of the network.

D.
They are separate from the central site and use NAT to route through the Internet to the central site.