Patricians Answer:
Explanation: I just took the test
By far the greatest factor that characterized the red scare was a deep and often impractical fear of communism within the United States, since communist nations were seen as a threat to the economic prosperity and freedom of the United States.
Zheng He belongs to the Ming dynasty.
The other major manufacturers of the world stopped trading
C because the meteorite crashing on the Earth produced a large dust cloud causing the plants to not receive sunlight causing herbivores to die resulting in carnivores which eat herbivores to eventually die as well.