One thing was that Seas were sometimes difficult to navigate which limited communication - D. this was already a factor which limited the possibility of one united Greece emergin because it made it very difficult to talk to these isolated islands that couldbe found through the difficult-to-navigate seas.
Another thing was that C - some city-states were located on isolated islands.
The collapse of the Soviet Union
Explanation:
Emperor Jahangir, Akbar's son, reinstated Islam as that of the state religion and maintained the policy of religious acceptance.
