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.
-With illegal immigration the unskilled labor supply curve:

A) shifts to the left.
B) becomes perfectly inelastic.
C) becomes perfectly elastic.
D) shifts to the right.
E) becomes non-existent.