B) Augustine
D) Aristotle
He invented the first incandescent light bulb in 1879
I'm pretty sure the answer is D. poor working conditions, because people back then were very serious when it came to working, since they needed the money badly. All of the other answer choices are factors that led to the Great Depression.
Earth is made up of mantle.
Silicon, magnesium, iron, and other minerals
-cassie
