The payroll tax for Social Security in the United States is

A technological innovation that reduces a firm's cost of producing additional units of output will lead to:

A. an increase in the quantity supplied by the firm, but no change in the firm's supply. B. a decrease in the firm's supply. C. an increase in the firm's supply. D. a decrease in the quantity supplied by the firm, but no change in the firm's supply.

If quantity supplied exceeds quantity demanded, there is a tendency for:

A. price to rise to restore equilibrium. B. price to fall to restore equilibrium. C. the demand curve to shift to the right to restore equilibrium. D. the demand curve to shift to the left to restore equilibrium.