In the 1950's, Communism was a big no-no, so when Communist North Korea invade South Korea the United Nations responded by sending financial aid to South Korean defenders and it began to think about sending troops to fight off the Commies.
Two allied nations enforce economic sanctions on a country until its government changes a key policy.
Harper's Ferry was a ship with a large arsenal.
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and the second one...
Answer:
A. Both cases established limits on public schools' actions based on the First Amendment