What was the impact of the Supreme Court decision Citizens United v. Federal Election Commission? A. The decision made it legal for corporations and other political groups to spend unlimited funds on political ads. B. The decision ruled that all laws barring same-sex marriage were unconstitutional, legalizing same-sex marriage. C. The decision made it legal for banks to offer home loans to people who did not show an ability to repay. D. The decision ruled that requiring states to expand Medicare under the ACA was unconstitutional.