The correct answer is B.
The development of cheap iron in the US was the major factor that lead to the building of skyscrapers. Being able to produce iron cheaply can be contributed to Andrew Carnegie. This American business mogul perfected the Bessemer process in several factories across the eastern part of the US. From there, he was able to sell cheap iron to American businesses for the purpose of growing their empire.
The system of government by privileged citizens or the upper class is called an "aristocracy," with the leaders in question usually having the most money of anyone in the society as well.
<u>i KNEW IT BUT I FORGOT</u>
<u>.</u>
Answer:
In this battle the patriots crossed the Delaware River on Christmas night, 1776, in a successful surprise attack on Hessian mercenaries.
I think that's what you mean.
