what is the default number of Watts consumed by each port if 802.3af compliant devices are attached

When deploying an 802.3af switch what is the default number of Watts consumed by each port if
802.3af compliant devices are attached to the switch?

A.
4 Watts

B.
6.3 Watts

C.
7 Watts

D.
15.4 Watts

E.
22.3 Watts