Research on Learning a Second Language ________

Multiple Choice

Research on learning a second language ________.

A) has proven that the critical period for learning a second language ends around age 8
B) has proven that the critical period for learning a second language ends at the onset of puberty
C) suggests there is at least a sensitive period for learning a second language, but when the sensitive period ends is unclear
D) suggests that neither a sensitive nor critical period exists for learning a second language