Olga,who Is Five Years Old,and Natalya,who Is Fourteen Years Old,recently

Olga,who is five years old,and Natalya,who is fourteen years old,recently moved to the United States.According to recent research on second-language learning,

A) Olga and Natalya should be equally proficient at learning English.
B) Natalya is likely to learn English more easily than Olga.
C) Olga is likely to learn English more easily than Natalya.
D) it is difficult to predict any differences in Olga's and Natalya's abilities to learn English.