How did farming make civilization possible in americas

How did the constitutional convention deal with slavery , one the most divisive issues of the period

The holocaust of world war ii resulted in a) the nazis effectively used propaganda to gain and hold power in germany. b) ethnic regimes carried out mass devastation. c) deporting all european jews to the island of madagascar. d) the systematic mass slaughter of european jews and and others in nazi concentration camps during world war ii.

Brainliestttme : ) how did the soviet union try to maintain control?