Which of the Following Is True of a Semiopen Primary

Which of the following is true of a semiopen primary? 

A)  Voters who are 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 or the Republican ballot. 
C)  Voters are allowed to vote for a party's candidates regardless of whether they belong to the party. 
D)  Voters are allowed to register with a party or change their party affiliations on Election Day. 
E)  Voters could choose the candidates of more than one party.