In this question, we're looking for an answer that weakens the author's argument. Answer (D) is wrong because it does the opposite - it strengthens the author's criticism of the LRCWA's recommendations about contingency-fee agreements. Let's say (D) is true. Then the total fees charged by lawyers who successfully litigate cases under uplift fee arrangements are only marginally higher than those without contingency agreements. But then the LRCWA's recommendations aren't really useful (taking a look at the second paragraph), which strengthens the author's arguments that the LRCWA is burdensome. Hope this helps!