If a body paragraph doesn't have enough specific details, A. it is too short and too weak to support the thesis statement. B. it can be mistaken for the introduction or conclusion. C. it is too difficult to revise.
It is A, it cannot be mistaken for introduction or conclusion because your stating the reasons that support your claim on the body paragraphs. It isn’t too difficult to revise because all you need to do is modify it by adding to the paragraph.