Which piece of evidence is the LEAST convincing for the critical-period hypothesis?
A) Abdelleh's language ability never fully developed.
B) Different neural mechanisms are used to process a second language by individuals who learned a second language in infancy and those who learned a second language after puberty.
C) The most proficient English speakers among immigrants to the United States are those who began learning English before age 7 years.
D) Adults are more likely than children to experience permanent language impairment as a result of brain damage.

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The Answer of Which piece of evidence is the LEAST convincing for the critical-period hypothesis?
A) Abdelleh's language ability never fully developed.
B) Different neural mechanisms are used to process a second language by individuals who learned a second language in infancy and those who learned a second language after puberty.
C) The most proficient English speakers among immigrants to the United States are those who began learning English before age 7 years.
D) Adults are more likely than children to experience permanent language impairment as a result of brain damage.

Which Piece of Evidence Is the LEAST Convincing for the Critical-Period