银柴胡的功效是

A.退虚热，除疳热，清湿热

B.退虚热，凉血，解暑，截疟

C.退虚热，清热燥湿，泻火解毒

D.清虚热，除疳热

E.和解退热，疏肝解郁，升举阳气