A developer is debugging an issue where a Sling Model is not properly adapting to...

The issue in this case is that the title field is declared but not annotated with @Inject. In Sling Models, all fields that should be populated from the resource or request must be annotated appropriately (@Inject, @ValueMapValue, or @Self). Without this annotation, the Sling Model cannot populate the field when adapting from the resource, resulting in the model not functioning as expected. Option A is incorrect because Resource.class is a valid adaptable for Sling Models. Option C does not apply because the problem is not with hard-coded paths but with injection. Option D is also incorrect because while @PostConstruct must be properly annotated, the root issue here is missing injection on the field. Adobe’s Sling Models documentation emphasizes correct use of injection annotations as a core requirement.