Answer:
How did the Mexican-American War lead to the Civil War? -Brought more states and territories into the US, many Northerners did not want slavery expanded into this new land. -Showed that both sides were willing to fight and die to protect their way of life.
Sorry if this is wrong
The U-2 incident was over a US CIA spy plane flying over the Soviet Union and taking photos of military installations and it was shot down by a missile from the Soviet Union so it caused a serious rift in relations between the two superpowers.
I believe the answer is A.
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