The only option that is not generally a reason why historians study societal change would be "<span>d. to estimate how long it would take to build a road system," since this requires a separate type of research. </span>
Andrew Carnegie was the one who used vertical integration to control steel production.
Vertical integration involves:
- Owning all the companies in the supply chain of a good including the <u>producers to the retailers </u>
- Being able to reduce production costs as a single company owns the various stages of production
Andre Carnegie founded Carnegie Steel which he used to acquire the suppliers of steel all the way to the sellers.
This allowed him to control the steel industry as he could overcharge competitors for steel whilst maintaining lower prices for his company.
In conclusion, Andrew Carnegie was able to us vertical integration to control the steel industry in a monopolistic like manner.
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He brought back $850 in his win that night in madison square garden
It was a. Charles Sumner who opposed the Dred Scott decision. He did this mainly on the grounds that he believed blacks had basic rights when it came to shin for their freedom in free states, which was the case for Scott.
