Answer:
D.Members of an alliance had to defend each other if one went to war.
Andrew Carnegie was born on November 25, 1835, in Dunfermline, Scotland. After moving to the United States, he worked a series of railroad jobs. By 1889 he owned Carnegie Steel Corporation, the largest of its kind in the world.
Im sorry
Okay have you thoughr about socialstudieshelp.com
Answer:
If ur talking about Industrial Revolution
Explanation:
Children worked at all kinds of jobs including mines, agriculture, factories, mills, manufacturing, fishing, etc. They also worked for more than 11 hours some even 15 h, and some even got disease from working so mucv in mines, got paid little to nothing.