Carnegie worked in the railroad industry, but how did Andrew Carnegie make his fortune?
A. Sewing machines
B. Steel plants
C. Telephones
D. Typewriters

The answer is B. According to investopedia.com, "Choosing to spend more time with his family, Carnegie sold his company to J.P. Morgan’s U.S. Steel Corporation (NYSE: X) for $480 million in 1901, famously making him the richest man in the world."

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free points always

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.