A popular model used to illustrate the concept of opportunity cost is called a. the production possibilities frontier.
Answer D
The Invaders that caused the most trouble for the Roman Empire in the 400s CE were most likely to have come from the Germanic Territory
Society would fall and crumble if everyone did that
The Western front was best characterized by trench warfare. The armies dug into the ground, both sides constructing elaborate trench networks. This caused them to reach a stalemate for most of the duration of the war.
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They closed the Mississippi River to all American commerce in 1784. This made it difficult for American farmers to get their goods to international markets. Spain would eventually allow Americans to use the river, but placed a tariff for the privilege. <span />
