Final answer:
A reduction in minimum wage causes a downward shift in the wage-setting (WS) curve since firms can now pay lower wages and are willing to employ more workers at each possible wage rate.
The correct option is C.
Step-by-step explanation:
A reduction in minimum wage will tend to cause a downward shift in the wage-setting (WS) curve, which is essentially the relationship between the wage rate that firms choose to pay and the level of employment.
The WS curve represents the wage rates that firms are willing to pay for different levels of employment based on productivity, bargaining power, and institutional factors, such as minimum wages. When the minimum wage is reduced, the legal floor on wages is lowered, which allows firms to offer lower wages.
As a result, they are willing to employ more workers at each possible wage rate, leading to a shift down and to the right of the WS curve, which corresponds to answer C.
In contrast, the product supply (PS) curve reflects firms' willingness to supply goods based on factor costs, and a change in minimum wage would not directly lead to an upward or downward shift of the PS curve as it is related to the price of the output rather than the price of labor.
The correct option is C.