The correct answer is: C. 36,000 km
The Indian Ocean Arc is an imaginary circle in space about 36,000 km over the equator. It is a great circle that passes through the North Pole, the South Pole, and the equator. The Indian Ocean Arc is the largest of the five great circles that divide the Earth into hemispheres.
The other options are incorrect because they are not the correct distance of the Indian Ocean Arc from the equator. Option A is 20,000 km, which is too short. Option B is 34,000 km, which is too long. Option D is 30,000 km, which is also too long.
The Indian Ocean Arc is a significant feature of the Earth’s geography. It is the longest of the five great circles that divide the Earth into hemispheres. The Indian Ocean Arc is also a major transportation route. It is used by ships to travel between the Indian Ocean and the Pacific Ocean.