单项选择题

A.干咳无痰,咽痒声嘶
B.咳嗽不爽,痰黄黏稠
C.咳而无力,痰白清稀
D.咳声重浊,痰多壅盛,色白而稀
E.咳嗽频作,声重咽痒,咳痰清稀