There Are No Longer Limits on Certain Corporate and Union

There are no longer limits on certain corporate and union funding of broadcast ads right before an election, as a result of ______________________.

A) ​the Court's ruling in Buckley v. Valeo (1976)
B) ​the Bipartisan Campaign Reform Act of 2002
C) ​the case of McConnell v. F.E.C. (2003)
D) ​the establishment of super P.A.C.s
E) ​the Court's ruling in Citizens United v. F.E.C. (2010)