Open market purchase of government securities by the Fed increases the federal funds rate

Refer to the figure above. The net exports of the country is zero:

A) for real exchange rates below R*. B) at the real exchange rate of R*. C) for all real exchange rates. D) for real exchange rates above R*.

Missouri can produce 10,000 tons of pecans per year or 5,000 tons of pears per year. Washington can produce 12,000 tons of pecans per year or 48,000 tons of pears per year. Which of the following statements about opportunity cost is CORRECT?

A) The opportunity cost of a ton of pecans is 2 tons of pears per ton of pecans for Missouri and 1/4 ton of pears per ton of pecans for Washington. B) The opportunity cost of a ton of pears is 2 tons of pecans per ton of pears for Missouri and 1/4 ton of pecans per ton of pears for Washington. C) The opportunity cost of a ton of pecans is 1/2 ton of pears per ton of pecans for Missouri and 4 tons of pears per ton of pecans for Washington. D) Both answers B and C are correct.