Answer:
The correct answer is option A.
Step-by-step explanation:
The demand for labor is said to be a derived demand as it is derived from the demand for products being produced using labor. It depends on the marginal productivity of labor and marginal revenue product of labor.
In other words, we can say that the demand for labor depends on the increase in the output produced due to hiring an additional unit of labor and the revenue earned from the sale of that additional output.
The demand curve of a firm is also called its marginal revenue product of labor curve. The marginal revenue product of labor is equal to the marginal product of labor times output price.