Use the data provided below to answer questions about the Utility Approach to CDT. point Qx TUx Qz TUz A 15 200 8 100 B 20 600 28 1,000 C 40 1,200 58 1,540 D 90 2,000 98 2,020 Moving from point A to B, Marginal Utility of X is: 80 56 70 94