They changed the policies to help the citizens with labor hours
The answer to this question is B. Elevators
One of the reason why skyscrapers were not popular before the invention of elevators was that it took too much energy to move from the groud floor to the upper floor with the stairs alone.
After the invention of elevators, we eliminate this problem and people could move from ground floor to upper floor with only little effort.
The relationship of demand and supply determines market prices. A balance of demand and supply factors determines an equilibrium price. When demand or supply, or both, shifts or moves, the equilibrium price changes.
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Answer:
The Compromise of 1876 effectively ended the Reconstruction era. Southern Democrats' promises to protect civil and political rights of blacks were not kept, and the end of federal interference in southern affairs led to widespread disenfranchisement of blacks voters.
Explanation:
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Answer:
<h3>the correct answer is amplitude</h3>
Explanation:
<h3>hope it helps you</h3>