Answer: D. through interaction and long-distance trade.
Explanation:
Because the Mayans, Inca, and Aztecs had helped by using the Colombian exchange by trading with other countries.
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The most surprising thing for me personally was the set up of the trenches, there is a very good system where the front line is the first to attack or be attacked while the others are there as backups. If someone were to get hurt within the first trench, there are easily accessible routes for the soldiers to take to retreat to safety, on the contrary, if the front lines were in need of any reinforcement whatsoever, there is a clear way to travel for the soldiers to get more ammunition or man power.
This is the case because the Middle Colonies would withhold policies in which granted religious toleration between certain sects and was more diverse religiously compared to the other colonies. From the Quakers and Lutherans to the Jews and many other religious groups.
C. the fight against Communism