Answer:
One of the most powerful bankers of his era, J.P. (John Pierpont) Morgan (1837-1913) financed railroads and helped organize U.S. Steel, General Electric and other major corporations. ... However, he faced criticism that he had too much power and was accused of manipulating the nation's financial system for his own gain.
During the Industrial Revolution, it was common for children to work in factories, mines, and other industrial occupations. Children as young as four commonly worked. ... Working on dangerous machinery had its consequences as many children were injured in accidents.
I'm going to say B because blitzkrieg means flash war in German. Rapid, flash, kind of the same idea.