Which Is True with Regard to the Prevalence of Language

Multiple Choice

Which is true with regard to the prevalence of language disorders?

A) Prevalence for specific language impairments ranges from 3 to 7 percent.
B) Prevalence is equal across socioeconomic groups.
C) Language disorders usually appear around age 8 or 9.
D) Phonological problems are rare and typically persist into adulthood.