Data on the Prevalence of Stuttering in African American and European

Data on the prevalence of stuttering in African American and European American preschool children (Proctor et.al. 2008) showed that

A) there was a greater prevalence of stuttering among European American children than African American children.
B) there was a greater prevalence of stuttering among African American children than European American children.
C) there was a greater prevalence of stuttering among African American girls than African American boys
D) there was no difference in the prevalence of stuttering between African American children and European American children.