A widespread disease that killed many people
the split of the Christian church
invasion from Arab Muslims
Any time cultures interact (example: immigration) they impact each other and cause culture change. Ideas and cultural concepts are constantly spreading and moving and changing.
D. Revivalists sent missionaries to convert Americans living in remote regions
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African Americans joined the Union arm in droves to fight for the abolition of all slaves in America, so they fought harder than most regular Union troops because they were fighting for their futures and lives (the South would enslave them again if the Union lost).
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Answer:
you didn´t give the answer choices lol
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