B. them. That is the unacceptable word in the sentence.
Explanation:
Comparing the leaves and the bags shows that the cartoonist wants us to think that raking leaves is like cleaning up trash.
I'm not sure if these are something you would put, but I would put.........
- Cool(ing)
- Refresh(ing)
- Like(ing) (probably not this one but I don't know any other word with (ing) at the end.)
