Which of the following sentences would be the best thesis statement for an
essay?

A. In this essay, I will show you why we must ban smoking in all
public places

B. I think we should ban smoking.
C. Because of the negative long-term health effects of secondhand
smoke on the human body, it is vital that the government
guarantee that public places will be smoke free.

D. In this essay, I'll demonstrate which brand of cigarettes is the
worst.