Which of the following groups took the most violent steps to discourage immigration?

the ku klux klan
sacco and vanzetti
the emergency quota act
the united negro improvement association

it was the kkk

Explanation:

as they are infamous for their lynchings and burnings of african americans

the outcome of 1970 oil crisis in united states was that, they began to search ways on how to reduce oil.

in 1970 was a period when there were energy and oil crisis. those who were major centers for industrialization were forced to keep way from supplying of petroleum.

some of the result of this crisis was economic growth became stagnant because prices of oil surged.

due to the increased prices some countries like mexico and norway benefited.