Why was the Preliminary Inquiry involving a subject closed?

The closure of the Preliminary Inquiry due to a complete investigation without findings indicates that the inquiry was conducted thoroughly, yet it did not uncover any evidence or relevant details that warranted further action. This conclusion suggests that all necessary steps were taken to assess the situation fully, and no pertinent issues were identified that would lead to ongoing investigation or concern.

Inquiries often begin with specific allegations or concerns that require examination. When a complete investigation is conducted, and there are no findings indicating wrongdoing or issues of interest in regard to security or policy violations, it logically follows that the inquiry would be closed. This process ensures that resources are focused on areas that may actually need further scrutiny and allows the agency to allocate its investigative efforts appropriately.

The other options, while plausible in various contexts, do not specifically relate to a scenario where a complete investigation yielded no findings, which is the crux of why the inquiry was closed in this case.