Wc, Wm, and Wu denote, respectively, wages in a perfectly competitive labor market, a monopsony, and a market with a labor union. Similarly, Lc, Lm, and Lu represent labor hired in those markets. Which of the following can we say with certainty from what we learned in class? Select all that apply. a. Wu > Wc > Wm b. Lu > Lm c. Lm > Lu d. Lc > Lm e. Lc > Lu