A. The Silk Roads because there was a lot of trading and disease spreading.
United State Of American and Canada
No the u.s did not enter the league of nations after world war 1 because the opposition of the press and u.s senate
C. Poor Living Conditions
In the South, slaves worked on cotton, tobacco, and rice plantations.
In the North, slaves worked in cities, on farms, and on ships.
I really hope this helped :)
