A machine must have the most direct access possible to two different networks.  However, it cannot act as a router between the networks.  Which of the following arrangements is most appropriate to facilitate the machine’s accessibility?()
A、ipforwarding turned on and two adapters
B、One adapter, with a route to a default gateway
C、An adapter in each network, and ipforwarding off
D、An adapter in each network, with a route only to the default gateway