A. Defeat, it makes the most sense.
Wait, what are the following method
It was the refinement of the Bessemer process, first used in the United States in the 1860s, that allowed for the major advance in skyscraper construction. As steel is stronger and lighter in weight than iron, the use of a steel frame made possible the construction of truly tall buildings.
the answer is the American system promised to help transport crops to northern markets.
