For this part，you are allowed 30 minutes to write a short essay. Suppose you have two options upon the place to live; one is on campus and the other off campus. You are to make a decision. Write an essay to explain the reasons for your decision. 判断文章的写作方法。（ ） A. 分类法 B. 例证法 C. 过程分析法 D. 比较对比法