Your text has a box on bilingualism. Which of the following is the best summary of this box?

a. children tend to be more successful in learning a second language when parents wait until children are already at the 2-word stage in the initial language compared to when they introduce both languages at the same time.
b. children tend to have difficulty learning a second language when exposed to different people who speak exclusively one language (e.g., mom always speaks Japanese and dad always speaks English).
c. children tend to be very successful at learning two languages when exposed to them early in life, but often have difficulty in school when taught exclusively in an unfamiliar language
d. children who are taught 2 languages at a young age have a better lifelong capacity for picking up new languages even if they forget one of the two initial languages they learned

Ans: c. children tend to be very successful at learning two languages when exposed to them early in life, but often have difficulty in school when taught exclusively in an unfamiliar language