To the extent that wage levels are NOT consistent with marginal productivity theroy, it is most like due to:
A. The fact that the moel of profit - maximization does not apply to a firms hiring decisons
B. The tendency of workers to seek the highest paying jobs available regardless of their abilities.
C. The presence of discrimination in labor markets andt he deire of some firms to payefficiency wages.
D. The fact that firms do not know what the marginal product of labor is.