Which of the Following Best Characterizes the Timing and Duration

Which of the following best characterizes the timing and duration of active language acquisition?

A) It proceeds most rapidly during the preschool years but continues throughout childhood and adolescence.
B) It occurs remarkably quickly, so that by 5 years of age the process is complete (except for adding vocabulary) .
C) It is a slow, gradual process until children reach school age, when the pace of acquisition greatly accelerates because of language arts instruction.
D) It is a slow, gradual process that continues into adolescence.