Paying an above-equilibrium wage rate might reduce unit labor costs by:

A) permitting the firm to attract lower-quality labor.
B) increasing the opportunity cost to workers of being fired for shirking.
C) increasing voluntary worker turnover.
D) increasing the supply of labor.

Paying an above-equilibrium wage rate increases the opportunity cost to workers of being fired for shirking. This means that workers are more likely to work effectively and efficiently since they do not want to lose their high-paying jobs. As a result, unit labor costs may decrease. However, the other choices are not correct. Paying above-equilibrium wages does not attract lower-quality labor, since high-wage jobs are typically sought after by high-quality workers. It does not increase voluntary worker turnover, since workers are less likely to quit if they are being paid well. Lastly, paying above-equilibrium wages does not increase the supply of labor, but rather it reduces the quantity of labor demanded by the firm.