Which of the Following Is (Are) True of the Hering-Breuer

Which of the following is (are) true of the Hering-Breuer reflex?
I.It results in an expiratory discharge pattern.
II.In adults it is activated only at small tidal volumes.
III.It has been suggested to be an important control mechanism in quiet breathing.
IV.It is important in regulating the respiratory rate and depth during moderate to strenuous exercise.

A) I, II
B) IV
C) I, II, III, IV
D) II, III