Pick the letter before one sentence from paragraph 8 that shows that author believes students should try to make the world a better place.
A) Every school must find ways to recycle. B) The more schools that recycle, the more students and teachers will learn. C) Then they can pass along the recycling message to other schools. D) It is so important for human beings to protect this beautiful earth.
Tip: Is the author's main claim a fact or an opinion? Can the author's main claim be proven true?