Which of the following is true about listening comprehension?

(A) A task for extensive listening performance aims to develop a global understanding of spoken language. 

(B) Listening is merely a passive process of receiving sound waves through the ear and transmitting nerve impulses to the brain. 

(C) Top-down listening technique proceeds from sounds to words to grammatical relationships to a final message. 

(D) As long as the teacher provides great quantities of input in the classroom, students can automatically convert the input into intake.