To the Degree That the IBEW Ensures That Through Its

To the degree that the IBEW ensures that through its rigorous training requirements for prospective electricians are qualified to do the work, it is

A) shifting the supply of electricians to the left.
B) shifting the supply of electricians to the right.
C) shifting the demand for electricians to the right.
D) kinking the supply of electricians to make it vertical at the level of the constraint.