Final answer:
A larger supply of workers leads to decreased real wages due to increased competition for jobs among workers. Conversely, a smaller supply would likely increase wages to attract employees.
Step-by-step explanation:
Other things being equal, a larger supply of workers tends to decrease real wages. This is represented by option d. When there is a greater supply of labor, employers have more potential employees to choose from, which usually leads to lower wages because there is more competition among workers.
Conversely, a smaller supply of labor would mean less competition for jobs, which could lead to higher wages, as employers might have to offer more to attract the necessary workforce. This supply and demand dynamic in the labor market also aligns with the economic principle that a worker who can produce more will be more desirable to employers, potentially leading to higher wages if the demand for such labor increases.