What are justifiable reasons for one country to intervene in another country's affairs?

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.

How did farm families get things they needed, such as cloth, in the mid-1800's

Which factors in europe caused the economic situation that occurred following world war i? choose 3. question 4 options: desire for luxury goods now that the war had ended loss of life and property damage from the war high inflation refusal to trade between countries inability to pay back debts strong enforcement from the league of nations