The Figure Given Below Shows the Income-Leisure Trade Off of an Individual.Figure

The figure given below shows the income-leisure trade off of an individual.Figure 16.5
AB and AC: Income constraints of the individual
I₁, I₂, and I₃ curves show the income leisure choices of the individual.
-For economists, discrimination is difficult to rationalize because:

A) it is costly to those who discriminate.
B) the firms can actually reap greater profits by discriminating between their workers.
C) in a freely functioning labor market, there is no such thing as discrimination.
D) economists know that in the real world, personal prejudices do not exist.
E) wages will not be allowed to fall below their natural equilibrium rate.