In the above figure, what is the minimum supply price for the fourth gallon of ice cream?

Which of the following does not necessarily apply to a pure monopoly?

A. The product the firm produces must have no close substitutes B. The firm must be the sole producer of a product C. The firm will charge the highest price possible D. Entry must be blocked

When the Fed issues currency

A. this increases our money supply only if it replaces old, worn-out currency. B. this increases our money supply only if it is used to accommodate the public's desire to hold more currency. C. this increases our money supply either if it replaces old, worn currency, or if it is used to accommodate the public's desire to hold more currency. D. this does not increase our money supply.