Answer: The Manhattan Project was the code name for the American-led effort to develop a functional atomic weapon during World War II.
Explanation: The Manhattan Project was the American program for researching and developing the first atomic bombs. The weapons produced were based solely upon the principles of nuclear fission of uranium 235 and plutonium 239, chain reactions liberating immense amounts of destructive heat energy.
D.Black codes
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Answer:
The main cause was that a few exports had increased European demand. After the war the economy slowed, causing increasing political unrest. Population growth, swelled by heavy immigration, contributed to urban concentration and increased social problems.
Explanation:
The answer is c... articles of confederation
