Which benefit applies to Thunderbolt technology?

A.
connects to Ethernet and power with one cable

B.
enables switching the discrete graphics processor on and off

C.
adapts to DisplayPort mini for backward compatibility

D.
easily connects to multiple devices with one cable

Explanation:
http://store.apple.com/us/question/answers/product/MB572Z/B/is-is-thunderboltbackwards-compatible-with-mini-display-port-devices-and-cables/QT49KCTAAA42T942X