石膏模型材料在密封的器皿中保存，主要目的在于（）

A.使清洁

B.防杂质进入

C.防干燥

D.防吸入空气中的水分

E.防虫

We firmly believe that war never settles anything. It only _____ violence. [ ]

A. runs into

B. comes from

C. leads to

D. begins with