—Which car is , the yellow one or the red one? —The red one, I think.A. expensiveB. much

—Which car is , the yellow one or the red one?
—The red one, I think.
A. expensive
B. much expensive
C. more expensive
D. most expensive

A. expensiveB. much expensive (答案→)C. more expensiveD. most expensive解析：比较级表示两个事物之间进行对比,最高级形式用于三个或者三个以上事物进行对比.从下文黄色的还是红色的,可判断前文应是比较级,选C.

就是这个解释