The Findings (Dalston, 1982) That Stuttering Incidence Is Higher in Children

The findings (Dalston, 1982) that stuttering incidence is higher in children with orofacial abnormalities than in the general population serve to prove that:

A) stuttering is an organically based disorder
B) stuttering is a disorder of speech production
C) stuttering is, in part, influenced by the acoustic (resonance) characteristics of speech
D) none of the above answers is true because the incidence of stuttering in this group is lower than that in the general population.