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 economic theory that developed in the 17th century was mercantilism. <span />
<span>Lee's Army failed to retaliate after the Union attack during the Wilderness Campaign because the soldiers were exhausted from the fighting in the Wilderness without breaking. Due to this exhaustion, the army failed to retaliate. Most of the soldiers also burnt to death during the battle.</span>