What Was the Result of the Ruling in the Supreme

What was the result of the ruling in the Supreme Court case Citizens United v.Federal Election Commission?

A) Corporations and unions were prevented from directly creating and airing campaign advertisements or political messages on national media.
B) Individual citizens were granted the same campaign spending rights previously possessed only by corporations and unions.
C) Corporations and unions were barred by law from spending money to influence the outcome of U.S.federal elections.
D) Corporations and unions were no longer barred by law from U.S.federal election spending that was derived from their economic activity.
E) The ban against corporations and unions from spending money to influence state elections was lifted,but the ban remained in place for federal elections.