Why Did Citizens United V

Why did Citizens United v. Federal Election Commission (2010) have little impact on California?

A) California required the governor and legislature to review any donation from a political action committee (PAC) .
B) California was the first state to ban political action committee (PAC) donations during a general election.
C) California did not allow political action committees (PACs) to raise unlimited funds before the U.S. Supreme Court ruling.
D) California allowed political action committees (PACs) to raise unlimited funds before the U.S. Supreme Court ruling.