The correct answer to this question is c
Answer:
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The idea that states can declare a federal law unconstitutional is called Nullification
<em>Nullification, in United States constitutional history, is a legal theory that a state has the right to nullify, or invalidate, any federal law which that state has deemed unconstitutional with respect to the United States Constitution (as opposed to the state's own constitution).</em>
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Answer: The Soviet
Explanation: They launches the first man made object, the Sputnik, into space on October 4, 1957
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.
