Because of new ideas & inventions
Sparta is the bigger city state
Answer:
John D. Rockefeller.
Explanation:
The other options were also among the richest men in the United States but, in the case of Andrew Carnegie, he made his fortune with the Steel industry. While J. P. Morgan was a financier.
John D. Rockefeller started the Standard Oil company in 1870 on Ohio and the corporation grew to be one of the most important monopolies of the entire history until the United States Supreme Court regulated the monopolies on a case against Standard Oil in 1911.
I hope this answer helps you.
Answer: The Great Wall of China was built as a military defensive line to defend the invasions from some northern nomadic nations. Apart from the function of defense, the wall also boosted the economy, as well as promoted the culture exchange and national integration of different nations at its two sides.
Explanation:
