How does the utility possibilities frontier relate to the contract curve? A. The points along the contract curve that are attainableattainable appear on the utility possibilities frontier showing the levels of satisfactionsatisfaction for consumers. B. The points along the contract curve that are feasible appear on the utility possibilities frontier showing the combinations of two goods that can be produced with fixed quantities of inputs. C. Every point along the contract curve appears on the utility possibilities frontier showing the extent to which it is efficient. D. Every point along the contract curve appears on the utility possibilities frontier showing the levels of utilityutility for consumers. E. Every point along the contract curve appears on the utility possibilities frontier showing the well-being of society as a whole.