既峻下冷积，又逐水消肿的药是（）

A.甘遂

B.商陆

C.巴豆

D.郁李仁

E.牵牛子

In the flat triangular surface depicted above, if  feet, what is the area of the surface in square feet ？（） (Figure not necessarily drawn to scale.)

A.A

B.B

C.C

D.D

E.E