Marc Spoke Ukrainian in Early Childhood but Stopped Speaking It

Marc spoke Ukrainian in early childhood but stopped speaking it when he was about 4 years old.He no longer explicitly recalls any Ukrainian words and says he can't speak the language.Which of the following situations might reveal his implicit knowledge of Ukrainian?

A) Administer a test of Ukrainian language comprehension and compare his results to others who have never spoken Ukrainian.Marc will score higher than lifelong nonspeakers.
B) Administer a test of Ukrainian language comprehension and compare his results to others who have spoken Ukrainian all of their lives.Marc will score just as well as lifelong speakers.
C) Provide Ukrainian language lessons.Marc will pick up the language more quickly than lifelong nonspeakers.
D) Provide Ukrainian language lessons.Marc will quickly realize that he does not need lessons.