In an open primary: 1 point Anyone who is a registered voter can participate Only a small number of party officials have a say in who becomes a candidate. Only registered members of the party holding the primary can vote The curtains in the voting booth are open.

Anyone who is a registered voter can participate

Explanation:

In simple words, In addition to participate for partisan representatives, an open primary can be understood as a primary election which does not allow electors to be associated with a particular party.

Voters will pick one party's ballots in a conventional primary election and decide for the nominee of that group. It was possible to consider that open primary as beneficial for civic engagement. Next the open system requires the involvement of non-partisan or neutral voters in the nomination process.

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.