0 for communication?

With which interface or interfaces can a MAP reach a Cisco WLC v7.0 for communication?

A.
through wired only

B.
through 5-GHz radio only

C.
through 2.4-GHz radio only

D.
through 2.4- or 5-GHz radio only

E.
through wired or 2.4- or 5-GHz radio