Which law allows for the release of a detainee after preventive imprisonment?

The correct answer focuses on Batas Pambansa 85, which specifically addresses the rights of individuals under preventive imprisonment. This law articulates the conditions and circumstances under which a detainee may be released from preventive custody, ensuring that constitutional rights are upheld. In the context of preventive imprisonment, it serves to protect individuals from indefinite or unjust detention, allowing for their release when certain criteria or conditions are met.

The other options, while related to various aspects of the legal and criminal justice system, do not specifically pertain to the issue of preventive imprisonment and the release of detainees. Republic Act 9165, for instance, is primarily concerned with the comprehensive law on illegal drugs, while the Inquisitorial Law and the Accusatorial System Act pertain to differing legal frameworks and procedures within judicial systems, rather than directly addressing the release of individuals from preventive imprisonment.