Why did independent greek city-states develop instead of a single state covering the entire greek peninsula? (points : 3) the climate in the north was unfavorable for farming. mycenaean kings could not effectively rule vast territories. there are only two major rivers on the peninsula. rugged mountains and hills made inland contact difficult.

The correct answer is - rugged mountains and hills made inland contact difficult.

While this answer may be surprising it is nevertheless true. At the time, there were no modern ways of transport. Moving from one location to another greatly depended on how passable a terrain was. Since the terrain between Greek city-states was very difficult to pass, maintaining autonomy and the sense of belonging only to the city was strong instead of belonging to the country. 

Ibelieve it belongs to the president.