Answer:
Lewis and Clark's team mapped uncharted land, rivers, and mountains. They brought back journals filled with information about the Native American tribes. They also brought back scientific notes about plants and animals they'd never seen before.
The Great Migration, or the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from 1916 to 1970, had a huge impact on urban life in the United States.
I would say D. sorry if not.
Answer:
the spread of communism in Asia
Explanation: