Which of the Following Statements Is the Best Advice for Parents

Which of the following statements is the best advice for parents who want their child to learn a second language?

A) As long as the child is exposed to the second language for an extended period of time, it does not matter when exposure to the language begins.
B) Wait to expose the child to a second language until he or she is old enough to be motivated to learn the language.
C) Expose the child to the second language as early as possible.
D) Begin exposure to the second language well after you are sure the child has learned the native language completely and proficiently.