Figure 18-4 -Refer to Figure 18-4.The Shift of the Labor Demand Curve

Figure 18-4

-Refer to Figure 18-4.The shift of the labor demand curve from D₁ to D₂ could possibly be explained by

A) a change in workers' attitudes toward the work-leisure tradeoff.
B) decreases in wages in other labor markets.
C) an increase in the price of firms' output.
D) All of the above are correct.