Which of the following would shift a market labor supply curve to the left?

A. a decrease in the price of output

B. an increase in the price of output

C. a labor-augmenting technological change

D. better employment opportunities in a closely-related job

Answer: Option (D) is correct.

Explanation:

Correct option: Better employment opportunities in a closely-related job.

There is a shift in the market supply curve if there is any changes in the employment opportunities in a closely related to the job. Suppose there are more employment opportunities in a closely related field in the economy as a result market labor supply curve shifts leftward.

Alternatively, if there is a contraction of employment opportunities then this will results in a rightward shift of the market labor supply curve.