B

A long-standing, low-grade pulp irritation from deep caries can trigger a reactive focal bone sclerosis at the root apex, producing a well-defined radiopaque mass known as condensing osteitis; chronic and acute apical periodontitis are typically radiolucent and/or painful, and a cementoma usually occurs in vital mandibular anterior teeth rather than a carious posterior tooth [Eversole, 1984, PMID 6593677; Douglass, 1993, PMID 8378050].