Which manufacturing sector of american economy made andrew carnegie a fabulously wealthy man

Why did french and austrian troops stops revolts in spain and italy

The constitutional amendment that profited denying voting rights to people based on race or color is the?

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.