Which of the Following Statements Is True About Childhood-Onset Fluency

Which of the following statements is true about Childhood-Onset Fluency Disorder (Stuttering) ?

A) Stuttering usually develops when children begin formal schooling.
B) Children who stutter typically have structural abnormalities of the vocal tract, mouth, nose, or tongue.
C) Many children who stutter during childhood have histories of Social Anxiety Disorder as toddlers and preschoolers.
D) As many as 80% of young children who stutter eventually recover.