Refer to the figure above, which shows a country's possible production possibility frontiers and indifference curves. If the country is producing at ________, then moving to ________ will cause utility to ________

Why did the United States abandon the gold standard in the 1930s?

A) The government wanted to move away from a floating exchange rate system to a fixed exchange rate system. B) The Treasury Department in the United States found it was cheaper to print paper money instead of gold coins. C) The government wanted to rapidly expand the money supply in response to the Great Depression. D) New sources of gold were discovered, so the price of gold plummeted, dramatically reducing the value of the dollar.

It can be difficult to define and enforce property rights against damaging pollutants when

a. many polluters are harming one person. b. many polluters harm the same large group of people with the same pollutant. c. the harms are difficult to quantify. d. All of the above are true.