Was it justified for the United States to enter World War One on the side of the allies

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.

Don’t mind the already marked answer but taking it now

How did france’s tax policies contribute to the french revolution?