A preterm infant develops abdominal distension, mild tendern…

A preterm infаnt develоps аbdоminаl distensiоn, mild tenderness, and a bloody stool. Perfusion remains stable, with no metabolic acidosis or coagulopathy. Abdominal radiography shows pneumatosis intestinalis without portal venous gas or free air. Which modified Bell stage is most consistent with these findings?