During a bed check, what must match the housing roster?

The correct answer is that inmates' IDs must match the housing roster during a bed check. This process is crucial for maintaining order and security within a correctional facility. The housing roster contains a list of those individuals who are assigned to specific areas or beds, and verifying that the inmates' IDs correspond to the roster ensures that the facility has accurate accounting of all residents. This verification helps prevent escapes, misidentifications, and potential safety risks for both staff and inmates.

Other aspects, such as inmate clothing or prison guards' IDs, while important for various operational functions within the facility, do not directly pertain to the accuracy of the housing roster. The time of the check is relevant for operational records but does not affect the identification of the inmates themselves. Thus, the focus remains on the inmates' IDs being accurately aligned with the housing roster during bed checks.