What is the purpose of paragraph 7 in the article?

A
to present the viewpoint of those who believe differently than the author and explain why that viewpoint is incorrect

B
to outline the opinion of the author, so the reader will understand the main idea of the article

C
to indicate reasons why the author is correct and provide evidence to support those opinions

D
to conclude the author's argument, for this paragraph comes at the end of the article.​