Which of the Following Is True About States with Caucuses

Which of the following is true about states with caucuses?

A) Voters attend open meetings where they express their presidential preferences.
B) The state legislature selects the state's delegates to the national conventions.- Consider This: Voters will select the preferred candidate directly.
C) Party officials select delegates according to their own preferences.
D) Candidates appoint supporters to serve as delegates who will attend the national convention