Which of the Following Helped Account for President Obama's Re-Election

Which of the following helped account for President Obama's re-election over Republican Mitt Romney in 2012?

A) The Supreme Court upholding government limits on political expenditures by corporations, unions, and advocacy groups in the case of Citizens United v. Federal Elections Commission (2012) .
B) The multiracial coalition that supported Obama and the Democrats, particularly Latinos, had grown demographically in electoral importance by 2012.
C) Mitt Romney ran as a moderate Republican, blurring the political differences between Obama and himself, making the contest a personality-driven contest.
D) Political and economic equality ceased to be a central theme of the 2012 election.
E) None of these choices are correct.