-The Above Figure Shows the Supply and Demand Curves for High-Skilled

-The above figure shows the supply and demand curves for high-skilled and low-skilled labor. The figure shows that high-skilled workers earn a wage rate greater than low-skilled workers because

A) the supply of high-skilled labor is greater than the supply of low-skilled labor.
B) high-skilled labor has a lower value of marginal product.
C) of both the cost of acquiring skills and the differences in the value of marginal products.
D) of discrimination.