Answer:
d. the quantity demanded for the market will increase to less than 30,000 workers.
Explanation:
Missing options:
maximum total demand for labor = 30 (at $8) x 1,000 firms = 30,000 workers, but since the equilibrium rate had been $9 for many years, some workers have already been hired at $9, and it is usually very difficult to lower someone's wage once they have been working. Even thought the quantity demanded will increase, it will probably not be able to reach 30,000 workers.