I think it’s C i’m not for sure
Green is often used for forest, tan for deserts, and blue for water. A map usually has a legend, or key, that gives the scale of the map and explains what the various symbols represent. Some maps show relief, or changes in elevation. A common way to show relief is contour lines, also called topographic lines.
Midpoint i think. not 100% sure tho!
The Emperor Wu also established a government monopoly in the trade in grain.