The Manager of an Automobile Dealership Is Considering a New $\mu$

The manager of an automobile dealership is considering a new bonus plan in order to increase sales. Currently, the mean sales rate per salesperson is five automobiles per month. The correct set of hypotheses for testing the effect of the bonus plan is

A) H₀: $\mu$ < 5 H_a: $\mu$ $\le$ 5
B) H₀: $\mu$ $\le$ 5 H_a: $\mu$ > 5
C) H₀: $\mu$ > 5 H_a: $\mu$ $\le$ 5
D) H₀: $\mu$ $\ge$ 5 H_a: $\mu$ < 5