Which of the following is a valid reason for granting an inmate community leave?

Granting an inmate community leave for a polygraph examination is supported by the premise that such examinations are often linked to legal obligations or evaluations related to the inmate's case. This legitimate purpose can be essential in the judicial process, either to assess the truthfulness of statements made by the inmate or as part of required procedures following certain convictions.

In contrast, weekend trips and social visits tend to be more personal in nature and don't typically fulfil a legal requirement or necessity. Court sessions, while also a valid activity, may be less associated with the specific context of community leave that applies outside of judicial proceedings, as they often take place within the confines of a court and are not considered "community leave" in the same sense. Thus, the polygraph examination stands out as the most appropriate reason for granting community leave under these options.