(Figure: Production Possibility Frontier for Caffeineland) Use Figure: Production Possibility Frontier for Caffeineland. Caffeineland can move from point C to point D at a cost of: A graph plots Doughnuts, in millions, on the vertical axis versus Coffee, in millions of cups, on the horizontal axis and shows a curve. The horizontal axis ranges from 0 to 50, in increments of 10. The vertical axis ranges from 0 to 25, in increments of 5. The curve is concave down and decreases from (0, 20) to (40, 0). Points B, C, and D are plotted at about (10, 17), (20, 15), and (30, 10), respectively. Two more points, A and E, are plotted at (10, 10) and (30, 20), respectively. Question 4 options: a) 10 million doughnuts. b) 5 million doughnuts. c) 10 million cups of coffee. d) Such a move is not possible, given the current resources available