The agricultural revolution caused mortality rates to plummet and population to dramatically increase. Due to the surplus of food, the amount of deaths decreased and this allowed people to live for a longer amount of time and have more children to feed.
Option 4:) World war two
All the other wars listed happened before communism spread
C is your answer The United States offered Europeans many more opportunities to migrate.
Hope this helps
- Kayla <3
Considered as Christians because they fought for God
