Slavery was not allowed in the USA. Hope it helps!
He was Vice President for the Confederate States.
A is the correct answer
B is not
because higher education did not contribute to Adolf Hitler (the rule at the time)'s view on how Jews were an inferior race to the superior Aryans
C is not
because Hitler's beliefs were against Marxism entirely
D is not
because Hitler's beliefs were that thr Aryan race was the superior race, therefore, should not be destroyed