Why is D correct? Why is A incorrect?

Hi Ryan, thanks for the question. Answer choice D is correct because the two authors disagree explicitly about whether they think it is within the purview of juries to not only apply laws but interpret them as well. Author A disagrees with this statement and the evidence for this is the second last paragraph of passage A, in which author A clearly states who is supposed to interpret laws and states that juries should not. Author B agrees with this statement and the evidence for this is found in the second and third paragraphs of passage B. Author B states that juries perform a useful function in assisting the legislature by indicating potential problems with relevant laws. Answer choice A is incorrect because while author A would agree, we do not know author B's stance about this point. I hope this helps. Please let me know if you have any other questions.