The correct answer is B. The intro includes the thesis. The thesis is your claim; it's essentially the argument you're trying to make. It must come in the intro in order to give your readers a sense of what you're going to be talking about in the paper. Option A is incorrect because the number of paragraphs in an essay will depend on the essay itself. Option C is incorrect because the conclusion is necessary. It not only wraps up your paper, but also leaves the readers with something to think about. Option D is incorrect because the very purpose of each body paragraph is to support your thesis.
