Final answer:
The attorney must disclose the false testimony to the court and take appropriate corrective actions, which could include correcting or withdrawing the testimony. So, option C is correct.
Step-by-step explanation:
If a witness called by an attorney has offered false testimony and the attorney comes to know of its falsity, the attorney must disclose the falsity to the court and, if necessary, take reasonable remedial measures, including correction or withdrawal of the testimony.
Ethically and legally, an attorney cannot ignore false testimony, advise the witness to change their testimony without informing the court, or handle the matter privately by confronting the opposing attorney to negotiate a settlement. It's crucial that an attorney not only abide by legal protocols but also uphold the integrity of the judicial system, ensuring all due process rights are respected, including those of the accused and the opposing party in pursuit of a fair judicial outcome.
According to the Sixth Amendment, it is the duty of the attorney to maintain integrity in the legal process. If a witness offers false testimony, the attorney is obligated to inform the court of the falsity and take any necessary actions to rectify the situation. This is important to ensure a fair and just trial.