The Phrase 'Charging the Jury' Refers To

The phrase 'charging the jury' refers to:

A) The trial judge's explanation to the jury about the nature of their role before commencement of trial.
B) The trial judge's directions to the jury concerning matters of law during the course of a trial.
C) The trial judge excusing the jury so it can retire and deliberate on a verdict.
D) A challenge against a jury member by one of the parties prior to the trial.