Answer:
Making a choice at the margins
Explanation:
Making a choice at the margins is when you decide to do more or less of an activity instead of doing it or not and in order to make the decision you analyze the benefit and the cost of spending more time doing that specific activity. According to this, the answer is that your decision is an example of making a choice at the margins because you decide how to spend an hour between watching football and going for a walk.
