If the investment curve is relatively vertical, the Keynesian conclusion is that the transmission mechanism has little effect on the economy

Refer to the figure above. If the average cost faced by the monopolist when it produces and sells the optimal output is $4, ________

A) it makes a loss of $60 B) it makes a loss of $120 C) it makes a profit of $60 D) it makes a profit of $90

Which of the following is true concerning the national debt?

a. It equals the budget deficit. b. When the budget deficit is declining, the national debt will fall. c. A budget deficit will reduce the national debt. d. A budget surplus will reduce the national debt.