I believe it is the last and second one.
Answer:
Missouri Compromise, (1820), in U.S. history, measure worked out between the North and the South and passed by the U.S. Congress that allowed for admission of Missouri as the 24th state (1821). It marked the beginning of the prolonged sectional conflict over the extension of slavery that led to the American Civil War.
Explanation:
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The correct answer should be A. By strengthening the powers of the US national government
The idea was having a strong centralized government that was based around US ideals and values.
That is a tough question: West Germany and Berlin, the Soviets declared the new currency void in the eastern partition under their control. Days later, the Soviet government closed supply lines to West Berlin. The United States Air Force and the British Royal Air Force organized a massive effort to deliver needed food, coal, and medical supplies into Berlin to thwart the Soviet blockade. The round-the-clock operation, which became known as the Berlin Airlift, sustained the residents of West Berlin for over a year, and secured the freedom of West Berlin from Soviet control.<span>
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Mayan's did because yes even though they lived were discovered first they were the ones who lasted longer alive