The election of Hiram Rhodes Revels in 1870 was significant because he was the first African American to —
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an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

do u have any answer choices man?

the soviet union wanted to impose communist governments in eastern europe.