The correct option is:"prohibits you from voting in a Republican primary election in an open primary state"
Primary Elections: The process for electing the President begins with the primaries of each party and in each state during the first six months of the election year. It is a nomination system that promotes competitiveness among applicants. With the result of the primaries the candidate nominated for the presidency of the country is elected, who will participate in the November election against the nominee of the opposing party.
The voter: Except in the state of North Dakota, citizens over the age of 18 with US citizenship who wish to vote in the primary or presidential election must register as voters. The process and requirements to register vary by state.
In many states citizens at the time of registration have the possibility to join (but without cost) one of the two parties if you want to participate in the primary election, in the caucus or the convention of that party. Under no circumstances may a citizen join two parties or in two states, but may change their membership before the election of turn.
