Subject: mathqa
Question: in a certain city , 60 percent of the registered voters are democrats and the rest are republicans . in a mayoral race , if 75 percent of the registered voters who are democrats and 25 percent of the registered voters who are republicans are expected to vote for candidate a , what percent of the registered voters are expected to vote for candidate a ?
Option: 
A: 57 %
B: 50 %
C: 54 %
D: 55 %
Answer: D