Final answer:
The opportunity cost for Hal attending college full time is D) Hal's lost wages at Burger Haven, as it represents the value of what he gives up (continuing to work) to pursue his education.
Step-by-step explanation:
When it comes to making decisions, the concept of opportunity cost is crucial in economics and business. The opportunity cost of a choice is the value of the best alternative that one gives up when making a decision. In Hal's case, the opportunity cost of attending college would be the benefits he forsakes by not choosing the alternative, which is working at Burger Haven.
Therefore, the correct answer is D) Hal's lost wages at Burger Haven. The other options, such as the cost of cola, textbooks, and commuting, are actual costs associated with attending college or commuting to work. They are not forgone alternatives as a result of attending college. In contrast, lost wages at Burger Haven represent what Hal would have earned if he had decided not to attend college but to continue working.