Which of the following is true of the 2010 ruling Citizens United v. Federal Election Commission? a. The Supreme Court raised the limit of the amount in controversy from $20,000 to $40,000 in diversity cases. b. The ruling unauthorized cities and counties from passing local zoning or housing-construction laws. c. The Supreme Court determined that the government may not ban political spending by corporations in elections when the spending is undertaken independently of the campaigns of individual candidates. d. The Supreme Court declared 501(c)4 organizations invalid and prohibited political parties from accepting any funding from these organizations. e. The ruling explicitly covered unions and nonprofit groups