Use the Figure Below to Answer the Following Question

Use the figure below to answer the following question. Figure 18.3.3
-Refer to Figure 18.3.3.At any given level of employment for high-skilled and low-skilled workers,the vertical distance between the two supply curves

A) disappears if there is free entry into the skill market.
B) disappears if there is equal pay for work of equal value.
C) is created by discrimination against low-skilled workers.
D) is the compensation required for the cost of acquiring human capital.
E) equals the value of marginal product of skill.