Closed-ended questions should be used when:

Closed-ended questions are specifically designed to elicit short, direct responses, often limited to a simple "yes" or "no" or a specific piece of information. This makes them ideal for situations where clarity and conciseness are paramount.

When a witness is not providing complete answers or is giving vague, ambiguous responses, closed-ended questions can help steer the conversation towards more clear and definitive information. By asking these questions, the interrogator can cut through the uncertainty and obtain specific details that may be vital to an investigation or understanding a situation.

In contrast, when gathering comprehensive information, open-ended questions encourage detailed responses, allowing the witness to explain their thoughts and experiences more fully, which would not be suitable for closed-ended questioning. The other options, which focus on clear responses or information overload, don't align with the primary utility of closed-ended questions, which is to clarify and extract concrete details when necessary.