Answer:
Why was it so hard to make peace? ... The German politicians were not consulted about the terms of the Treaty. ... They complained bitterly, but the Allies did not take any notice of their ... This was not really the case, but many Americans believed it. ... Here you can read about the terms of the Treaty of Versailles in detail.
Explanation:
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 ability to do something successfully or efficiently.
Answer:
environment is with the creating more jobs
economy is with recommending
education is with making public college