What Made the Supreme Court Decision in Citizens United V

What made the Supreme Court decision in Citizens United v. Federal Elections Commission so controversial?

A) It capped the amount of money any entity or individual could contribute to election campaigns.
B) It allowed corporations and other groups to spend unlimited funds to influence elections.
C) It required candidates to indicate that they support political advertising on television done on their behalf.
D) It strengthened the McCain-Feingold campaign-finance law.
E) None of these choices