If the Fed paid a lower interest rate to banks on their reserves at the Fed, the money supply would tend to rise

In the above figure, a black market emerges with a

A) price ceiling of $4. B) price floor of $2. C) price floor of $4. D) a rationed quantity 30.

"As the quantity of labor hired increases, the value of marginal product stays constant as long as the wage rate is constant for all workers." Is the previous statement correct or incorrect? Explain your answer

What will be an ideal response?