A grand jury may issue an:

A grand jury is a body of citizens convened to determine whether there is enough evidence to formally charge an individual with a crime. The primary function of the grand jury is to investigate and assess evidence presented by the prosecution. When the grand jury concludes that sufficient evidence exists to warrant formal charges, they issue an indictment.

An indictment serves as a formal accusation of criminal activity, enabling the legal process to move forward. This is a crucial step in the judicial system, as it ensures that there is a basis for prosecution before an individual is brought to trial.

The other options represent different legal actions or documents that do not pertain specifically to the grand jury's function. An information is a formal charge made without a grand jury. An injunction is a court order requiring a party to do or refrain from doing specific acts, typically in civil cases, and impeachment relates to the political process of removing an official from office. Therefore, the indictment is the sole choice that accurately describes what a grand jury may issue.