Answer:
I believe it is A
Explanation:
The Vietnam war was during the 20th century and one of the first independent countries in Africa was during the 1840s, which would also knock out options D and C. I really hope this helps :)
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With the firing on Fort Sumter, the American Civil War was officially upon both the North and the South. A war that lasted four years and cost the lives of more than 620,000 Americans and freed 3.9 million people from the bondage of slavery.
#3. A and C
#4. A.
I'm not too sure if this is correct but I hope this helps.
The American Revolution was principally caused by colonial opposition to British attempts to impose greater control over the colonies and to make them repay the crown for its defense of them during the French and Indian War (1754–63).
