Use the Figure Below to Answer the Following Questions

Use the figure below to answer the following questions.

Figure 19.3.5
-Refer to Figure 19.3.5. This figure shows the labour supply curves and the value of marginal product curves for high-skilled and low-skilled workers. The equilibrium wage rate for low-skilled workers is

A) $3 an hour.
B) $7 an hour.
C) $6 an hour.
D) $5 an hour.
E) $4 an hour.