Final answer:
In a grand jury proceeding, the prosecutor, witness, defendant, and defendant's counsel all provide testimony.The correct option is a.
Step-by-step explanation:
The statement is true. In a grand jury proceeding, the grand jury members hear testimonies from various individuals involved in the case, including the prosecutor, the witness in the case, the defendant, and the defendant's counsel. The purpose of the grand jury is to determine whether there is enough evidence to indict the defendant and proceed with a trial.