<prompt> The stability of a mandibular complete denture will be enhanced when:The level of occlusal plane is above the dorsum of the tongueThe tongue rests on the occlusal surfaceThe lingual contour of the denture is concaveThe posterior teeth on the denture have a broad buccolingual width  <response>: Ideally, the best stability occurs when the occlusal plane is parallel and anatomically oriented to the ridges. An occlusion plane that is too high, forces the tongue into a new position. This can disrupt the normal position of the floor of the mouth resulting in partial loss of the border seal. 