All of the Following Statements Are True of Specific Language

All of the following statements are true of specific language impairment (SLI) EXCEPT:

A) SLI first came to light in a single family whose members were generally intelligent but demonstrated problems using particular syntactic structures
B) several genetic defects may contribute to SLI, including some that are language specific and others that have broader, more domain-general effects
C) individuals with SLI struggle to process rapid speech sounds and have this same problem with rapid visual stimuli
D) studies of language skills and deficits in those with SLI can help inform scientific knowledge on the extent to which language skills are domain specific