It would be A. Adding machine it was invented in 1642.
Explanation:
The reason why world war 1 was so significant is beacuse was one of the great watersheds of the 20th century.
There were smarter, more qualified people working for the government which lead to a stable government.
Answer:
Yes im pretty sure like 9.90%
B. A graph showing the number of Native America’s between 1492 and 1600.
I think this is the best answer because the question places emphasis on STUDYING the effect of germs exchanged, not what type of germs were exchanged.
