Inmates ________ not be required to work more than 48 hours.

The correct answer indicates that inmates should not be required to work more than 48 hours. This phrasing emphasizes the expectation or recommendation regarding the treatment of inmates in relation to work hours. It implies that there is a guideline or standard that promotes the well-being of inmates by limiting their work hours to avoid potential issues such as overexertion or fatigue.

Using "should" conveys a level of consideration for humane treatment and can reflect norms or policies that align with health and safety standards within correctional facilities, recognizing inmates' rights to reasonable working conditions.

In this context, the other options suggest different degrees of obligation or possibility. While "might" indicates possibility without a strong recommendation, "must" and "shall" imply a legal or mandatory requirement that might not accurately reflect the intent of promoting humane treatment. "Should" is the most appropriate term as it advocates for a standard or ideal practice rather than imposing a rigid requirement.