What is one difference between closed and open primary elections?
a.Closed primaries prevent "crossover voting"; open primaries allow it, which can produce nominees that don't represent the values of the party.
b.Closed primaries are used mainly by the Republican Party, while open primaries are used mainly by the Democratic Party.
c.Both closed and open primaries welcome independent voters, but only open primaries allow registered members of other parties to participate.
d.Closed primaries encourage all voters to participate, while open primaries can reduce participation.