C should be correct answer
The answer is D. Region.
It is NOT:
Latitude because it is the distance from the Earth's equator.
Place because that is just one location.
Longitude because it is the distance east and west from of the meridian at Greenwich, England.
1. Galaxies seem to be moving away from us which can support Big Bang Theory.
2. The abundance of Helium and Hydrodgen also support the Big Bang theory!
Personlly I do not believe in the big bang theory but if you need more reasons please comment! :-)