Research Examining Groups of Deaf Children Who Had No Exposure

Research examining groups of deaf children who had no exposure to formal spoken or signed languages has demonstrated that:

A) children rarely go beyond the linguistic input they receive.
B) although children sometimes go beyond the linguistic input they receive, their spontaneous language remains far from qualifying as a true language.
C) children do go beyond the linguistic input they receive, and their spontaneous language can develop into a true language.
D) children who are not exposed to a formal language are unable to comprehend or produce language.