— Can you tell me _____ it is from home to school?

— Sure. It's about three kilometers. [ ]

A. how much

B. how long

C. how far

D. how soon

“方从法出”的含义是（）

A.有法必有方

B.根据所立治法选方或组方

C.方剂从属治法

D.方剂体现治法

E.先有法而后有方