Which One of the Following Is True Regarding Open and Closed

Which one of the following is true regarding open and closed primaries?

A) More states hold open primaries than closed primaries.
B) In a closed primary, the voter can select the ballot of the party in whose primary he or she wants to participate; open primaries allow only party members to participate.
C) Political parties generally do not favor closed primaries because they encourage raiding; open primaries discourage raiding.
D) Closed primaries restrict voting to registered members of that party only; in open primaries voters can select the ballot of the party in whose primary he or she wants to participate.
E) There are no significant differences between open and closed primaries.