The Federal Reserve tends to increase the money supply each year

Refer to Figure 13-3. Which of the points in the above graph are possible short-run equilibria but not long-run equilibria? Assume that Y1 represents potential GDP

A) A and B B) B and D C) A and C D) C and D

Some factors that allow firms to make economic profits are beyond its control. All but one of the following is an uncontrollable factor. Which factor is controllable?

A) chance events B) consumer tastes C) product differentiation D) input prices