To answer your question accurately, I would need to see the specific map you are referring to and the context it presents regarding political changes and divisions. However, I can provide some general insights into each option:
A. Business rivalries - These can certainly lead to political divisions and tensions, especially in regions where economic interests are intertwined with national identities.
B. Religious differences - Historical and contemporary conflicts often arise from deep-seated religious divisions, leading to intense political changes and divisions.
C. Competition for oil-rich territories - In many regions, such as the Middle East, competition for oil resources has been a significant factor in political instability and conflict.
D. Communist versus capitalist conflict - This ideological divide was particularly pronounced during the Cold War and continues to influence political alignments in various parts of the world.
Without the specific context of the map or the nature of the divisions it illustrates, I can't definitively choose one option. However, if the map clearly depicts divisions rooted in resource competition, then option C might be particularly relevant. If it showcases struggles related to ideology, then D might be the most appropriate. Please consider the details of the map and its specific content to select the most suitable answer.