What must a party submit in a written request for discovery?

The correct choice highlights the requirement for parties to submit a list of potential witnesses in a written request for discovery. This practice adheres to the principles of full disclosure during the discovery process, which is crucial for ensuring that all parties are aware of the evidence and witnesses that may be presented at trial.

By providing a list of potential witnesses, the requesting party allows the other side to prepare for the case, facilitating a fair trial and promoting judicial efficiency. This fosters a transparent litigative environment where both parties can assess the strengths and weaknesses of their positions based on the anticipated testimonies.

While documentary evidence and expert witness opinions are also relevant components in the broader discovery process, they do not specifically fall under the requirement for a written request for discovery focused solely on potential witnesses. Thus, the emphasis on the list of witnesses as a separate item in the discovery request underscores its importance in case preparation and trial strategy.