3) Who was Andrew Carngle? How did he expand his business? 4) Explain the business concept of vertical integration

Who was John D. Rockefeller? Explain his concert of horizontal integration

Please help guys ! Thank you if you do!

Andrew was a Scottish american industrialist & Philanthropist. Andrew lead the expansion of the american steel industry in the late 19th century, ad became one of the richest Americans in history. He became a leading Philanthropist in the United States and the British empire.

John D rockefeller was a business magnate & Philanthropist. He is considered the wealthiest american alive.

the answer your looking for is c. : )