Answer:
B
The North Atlantic Treaty Organization was created in 1949 by the United States, Canada, and several Western European nations to provide collective security against the Soviet Union. NATO was the first peacetime military alliance the United States entered into outside of the Western Hemisphere
5. is the US has unequal economic opportunities.
6. Correct! Seminole War.
7. Adams-Onis Treaty.
8. Correct, slave revolt.
9 . Alien and sedition acts.
10. Correct, it was important for transportation of goods.
The correct answer is Malaria
Malaria was a huge problem since it couldn't be treated and people mostly died from it. It prevented numerous explorers from venturing into places like Africa where Malaria was running rampant due to the huge amount of mosquitoes. When it was discovered, it enabled numerous people to live at ease because they could not live with the disease or prevent getting it.
