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.
Answer:
The Hitler Youth programs were put into place to demonstrate that Hitler cared about the well being of Germany and its people so it started as a way too attracted and entice the youth into joining. While Hitler gained more control, he started spreading more of his hateful ideas which was slowly integrated into the Hitler Youth Programs as a way to slowly brainwash the kids. With time the programs focused mainly on ingraining those hateful ideas into the next generation. The group of children would later become the next set of Nazi soldiers who would gladly fight for Hitler because they grew up learning to hate all in those Hitler Youth Programs.
Explanation:
One of the reasons why most Irish Americans favor neutrality was because they were wary of other immigrant populations entering the country as refugees, which would likely happen if America got involved in the war.
The Soviets were setting up nuclear missiles in Cuba. This meant that they were now able in theory to launch a nuclear missile directly at large parts of the USA and it was therefore viewed as a threat by the USA. I hope that helps.