They both represent the difference. For Example the opposite of safe is danger, and the difference of safe is danger.
B. To explain the rights to the citizens of the United states.
The correct answer is A.) Yes, I have finished washing the dishes.
We are given with a statement given above. The answer is D since there is no erratum involved in the sentence. Children is already plural hence placed after n. Monkey bars and swings are not in the state of owning something so there should not be any apostrophe placed.