Which action is prohibited for a person subject to a subpoena during an ongoing investigation?

The correct response to the question centers around the confidentiality and the integrity of an ongoing investigation. When a person is subject to a subpoena, especially during an active investigation, there are strict guidelines regarding what information can be shared.

Disclosing whether documents were provided might compromise the investigation by revealing too much to other parties who may be involved or interested. This type of disclosure could lead to interference, destruction of evidence, or witness tampering, all of which jeopardize the integrity of the investigative process. The protection of the investigation's integrity is paramount, and keeping the details of compliance with the subpoena confidential ensures that all parties adhere to the legal framework set by law enforcement and judicial systems.

In the context of the other options, discussing the subpoena with friends or sharing details about the case could also be problematic but are not as directly tied to the integrity of the evidence or the investigation as disclosing whether documents were provided. Identifying the records requested is usually a standard aspect of the subpoena process itself and does not represent an act that directly obstructs justice in the same way that directly confirming compliance would. Thus, the prohibition against disclosing whether documents were provided is specifically intended to protect the ongoing investigation from potential interference.