Answer:
Just a tip- in order for people to answer you need to add a picture (I'm guessing you did but it didn't work so try again) sorry I can't help
Horizontal integration is when a company buys out their competitors or other companies in the same field as them in order to decrease price competition, and consumers will have no choice but to purchase from Carnegie.
Therefore, by buying out his competitors, such as Allegheny Steel, Carnegie used the concept of horizontal integration to build up his monopoly of the steel industry.
To stop hateful or negative comments towards the USA by its own people
The voyages of Christopher Columbus led to the first lasting European contact with the Americas, inaugurating a period of European exploration, conquest, and colonization that lasted for several centuries. Columbus was not the first European explorer to reach the Americas having been preceded by the Norse expedition led by Leif Erikson in the 11th century. Leif Erikson was an Icelandic explorer considered by some as the first European to land in North America (excluding Greenland), before Columbus. There is much debate as some say that many different people, spanning centuries, set foot on the New World (as the Americas were called) before Columbus, and, of course, the ancestors of the Native Americans had already discovered it many years before.