Either the second or third ones
The rise of power can cause problems if ghana rises so they would cause a war if umayyad did they would cause a system mathematical droubt but if this isn't the answer and this is a multiple choice answers please post them
I think it is c I used process of eliminating and I think it is c
A choropleth map (from Greek χῶρος "area/region" and πλῆθος "multitude") is a type of thematic map in which areas are shaded or patterned in proportion to a statistical variable that represents an aggregate summary of a geographic characteristic within each area, such as population density or per-capita income.