Erica ha worked the following hours at her job as a waiter at a local restaurant:

Week One - 28 hours
Week Two - 47 hours
Week Three - 40 hours
Week Four - 39 hours
Which of the following statements is correct?
A. Erica is owed 7 hours of overtime pay.
B. Erica is owed no money for overtime pay because her average hours per week are below 40.
C. Wait staff are not entitled to overtime compensation because of their tips.
D. Erica is owed compensation for the failure of her employer to give her the agreed-for 40 hours per week.