The Wild Boy of Aveyron Never Developed Complete, Efficient Language

Multiple Choice

The Wild Boy of Aveyron never developed complete, efficient language skills even after years of intensive therapy.This would support the statement that:

A) language acquisition is only biologically based.
B) language acquisition is only environmentally based.
C) language acquisition is facilitated by caregivers and teachers.
D) there is not a critical period for language learning.