The Diagram Below Shows the MRP Curve for a Firm

The diagram below shows the MRP curve for a firm producing copper plumbing pipe.The factor of production being considered here is hours of labour.
FIGURE 13- 2
-The diagonal line on a Lorenz curve diagram represents

A) the percentage of income received by the top 50% of families.
B) the degree of inequality in the distribution of income.
C) the dollar incomes of the bottom 50% of families.
D) the percentage of income received by the bottom 50% of families.
E) where the Lorenz curve would be if there were complete income equality.