All people, ________ they are old or young, rich or poor, have been trying their best to help those in

need since the disaster.[ ]

A. even if  

B. whether

C. no matter  

D. however

王某，男，30岁，患者2周前因被雨淋而受凉，于当晚感觉不适，渐次发热恶寒，少汗，头痛，咽喉不适，自服感冒药未见好转，1周后眼睑及双下肢浮肿。来诊时：发热，微恶风，咳嗽，少痰，双眼睑及双下肢浮肿，小便黄而短少，舌苔微黄，脉浮。中医诊为水气病。诊断为水气病的最重要根据是（）

A.恶寒，发热，小便黄而短少

B.咳嗽，小便短少

C.恶寒，发热，咳嗽，脉浮

D.恶寒，发热，小便短少

E.浮肿，小便短少