The answer is b changing the way americans thought of the government i know this cause i had this test before
March, 29 1973. If it asks you a reason why the US left Vietnam, it's because the US signed a peace treaty in Paris.
The Qing Dynasty followed the collapse of the Ming Dynasty
The Middle Path is the proper way to reach Enlightenment because it leads to gaining insight, which them leads to wisdom, which advances to calmness, knowledge, to the Sambodhi, and finally, to Nirvana.