Climate change may be a big problem, but there a

Question

Climate change may be a big problem, but there aClimate change may be a big problem, but there are many little things we can do to make a ____.
A. different B. differences C. difference D. differ这个题怎么做

Answer 1

C
make a difference/make differences
固定短语，意为：有意义

Answer 2

选c，make a difference是固定短语。