Final answer:
The opportunity cost of your time is different from your friend's. The answer to your question is d.
Step-by-step explanation:
The answer to your question is d. opportunity.
The reason why the opportunity cost of your time is different from your friend's is because individuals value their time differently and have different preferences. In this scenario, you are willing to wait in a queue for an hour because you place a high value on riding the new roller coaster, while your friend has no interest in waiting that long. This indicates that the opportunity cost of your time (waiting in the queue) is lower for you compared to your friend.