Sagot :
Answer:
B.
Explanation:
Corporations and unions have been able to spend unlimited sums of money on campaign advertising since 2010 thanks to the fact that C: the Supreme Court ruled that campaign spending is a protected form of free speech.
In 2010, the Supreme Court in the case Citizens United v. Federal Election Commission, ruled that the federal government could not limit political campaign financing from independent organizations such as corporations and unions. The Court stated that those limitations were against the First Amendment.