Which of the Following Is a Difference Between Democratic and Republican

Multiple Choice

Which of the following is a difference between Democratic and Republican primaries?

A) The Democratic Party requires that state presidential primaries allocate delegates on the basis of a winner-take-all system while the Republican Party does not.
B) The Democratic Party requires that state presidential primaries allocate delegates on the basis of proportional representation while the Republican Party does not.
C) The Republican Party requires that state presidential primaries allocate delegates on the basis of proportional representation while the Democratic Party does not.
D) The Republican Party requires a two-thirds majority vote in a state to secure delegates while the Democratic Party does not.
E) The Republican Party has only closed primaries while the Democratic Party has only open primaries.