For Students Learning English, Which of the Following Is True

Multiple Choice

For students learning English, which of the following is true?

A) Students all go through predictable and sequential stages of language acquisition and at approximately the same rate.
B) The final stage of language acquisition is such that the student will have mastered BICS, but not CALPS.
C) It is easier to for students to master BICS than CALPS.
D) It may take 5-7 years for a student to acquire academic language proficiency.