D. facilities for medical experimentation
Mountains isolated the city-states Athens and Sparta. Those city states had different cultures and they were at war.
Hope this helps.
After World War II, there was a great movement of decolonization, with many colonies reaching independence from their parent countries. After the war, countries had to focus on rebuilding themselves and their economy, which led to a liberation of many colonies.
An example of that is India, that gained its independence from Britain in 1947. We can also mention Libya, Pakistan, Myanmar and Sri Lanka, as countries that reached independence right after WWII.
Had the most votes for both popular vote and the electoral vote
683 years passed before they used lowercase letters.