Workers employed by andrew carnegie mined iron ore in ohio. the ore was transported across the great lakes on ships owned by carnegie and then transported to pittsburgh, pennsylvania, on carnegie's railroad. finally, workers in carnegie's mills turned the iron ore into steel.
this information best describes which business innovation from
the industrial era?
a. mail-order catalog
b. assembly line
c. vertical integration
d. department store
bibliography and citations to credit the sources hope this you if not my deepest of apologize ^w^
the noble might have thought that the system was far because they had lot of things and riches and the serf would have thought that the feudal system was un fair because of the way they were treated.