In transparent mode, when choosing between using the built-in MTA or using the transparent proxy,
what difference might be encountered regarding mail routing?

A.
The transparent proxy can only be enabled on a route mode interface.

B.
In split-horizon DNS setups, the transparent proxy will get confused and route mail back to the sender.

C.
The built-in MTA may decide to route the message to a different next-hop MTA.

D.
The transparent proxy may decide to route the message to a different next-hop MTA.