Outlawed slavery in the territory
Answer:
A lot of things had changed
Andrew carnegie is really famous for creating a monopoly in steel industry in the united states during his era.
So, the type of business practice that andrew carnegie pioneered with carnegie steel corporation would be : controlling the entire market place for a single product in order to set prices
hope this helps
The correct answer for this question is D.
Around this time, Feudalism WAS being used in this area, so that statement is false.