Congress had decided that once a slave traveled into a free state, they were free and they could never be enslaved again. But in the Dred Scott decision, they changed their mind and people no longer had to honor "once free, always free."
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Answer:
A. low crop prices
Explanation:
Took this test yesterday and got 100%
Europeans couldn't travel into the interior of Africa in order to take it over because of the African-ruled trade, couldn't navigate violent rivers, or overpower their strong armies. Disease also held them back.
<span>Which of the following was a farming tool used by the farming tribes on the Great Plains?
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travois
