Which of the Following Statements About Partisanship in the 2016

Which of the following statements about partisanship in the 2016 election is correct?

A) There were a large number of crossover voters as about 25% of self-identified Democrats voted for Governor Romney.
B) President Obama won reelection in 2012 by winning the support of Independents because of a large number of Democratic defections.
C) About 90% of partisans voted their own party's presidential candidate while independents split their votes.
D) Weaker partisans were more likely to vote for a presidential candidate from the other party while Independent voters were more likely to vote for third party candidates.