Theresa Began Studying Japanese When She Was in the Eighth

Multiple Choice

Theresa began studying Japanese when she was in the eighth grade.After many years of study,however,she still speaks Japanese with an accent and lacks perfect fluency.This is probably because ____.

A) she had already passed the critical period of language development when she began studying Japanese
B) she is not genetically "prewired" for Japanese
C) she learned and spoke a number of different dialects
D) she continued to speak English while she was studying Japanese, which blocked acquisition