In the tropics where the Earth you have stood for the Sun to pass directly overhead that is passing through your Zenith at some time of the year. This id is also known to people as within +/- 23 degrees to the equator. Hence, the answer to the question is "on the topic or within +/- 23 degrees to the equator".
The fact that US citizens have a high per capita income (per capita = per person) allows them to consume a disproportionately large amount of products compared to the rest of the world. So I think the answer is B.
