Cochlear Implants Are Effective at Allowing Speech Comprehension If They

Cochlear implants are effective at allowing speech comprehension if they are implanted

A) in adults who had learned spoken language prior to deafness, or congenitally deaf children by age 3.
B) in adults, regardless of the onset of deafness.
C) in children by age 5, regardless of the onset of deafness.
D) in congenitally deaf children by age 5, or children to age 12 with milder hearing impairments.
E) prior to age 12.