what rate/reach combinations?

In ADSL DMT systems, the highest downstream transmit power occurs at what rate/reach combinations?

A.
384 kbps at 17 kft (5.1 km)

B.
8 mbps at 1 kft (305 meters)

C.
1 mbps at 9 kft (2.75 km)

D.
8 mbps at 9 kft (2.75 km)