Here are the answers to your questions:
Question 1: Who is credited for using his wealth to build up the steel industry?
- Andrew Carnegie
Question 2: How did horizontal integration change the way business was done in America?
- Large companies grew larger by merging with other companies or acquiring them.
Question 3: Which of the following was the main policy of government toward big business in the late 1800s?
- laissez-faire
Question 4: What was one effect the growing railroad industry had on the country?
- National markets increased as goods could be sold across the country more easily.