Which of the Following Statements Is True of a Semiopen

Which of the following statements is true of a semiopen primary?

A) Voters who contest elections as independents are automatically enrolled in the party for whom they vote.
B) Voters request the ballot for the party of their choice, either the Democratic ballot or the Republican ballot.
C) Voters are not allowed to vote for a party's candidates unless they belong to the party.
D) Voters are required to declare their party affiliations on Election Day.
E) Voters can choose the candidates of more than one party.