What entity must approve the written plan for inmate physical exercise and recreation?

The correct answer is that the Commission must approve the written plan for inmate physical exercise and recreation. The Commission has the authority and responsibility to oversee the policies and procedures regarding the welfare of inmates within the detention system, including aspects like physical exercise and recreation. This oversight is crucial as it ensures that the plans meet legal standards, promote health and safety for inmates, and adhere to best practices in correctional facility operations.

Other entities, such as the Department or the Board, may have roles in broader administrative functions or other aspects of facility management, but they do not typically handle the specific approvals required for operational plans like those concerning inmate recreation. The term "Officers" generally refers to individuals enacting policies rather than the governing body responsible for formulating and approving such plans. Therefore, the Commission's role is pivotal in ensuring that inmate exercise programs are sound, effective, and compliant with regulatory frameworks.