Which of the Following Explains the Importance of Reflexes

Which of the following explains the importance of reflexes?

A) Reflexes are merely remnants of our evolutionary past and have little importance.
B) Reflexes govern all our behaviour.
C) Reflexes provide ready-made behaviours that ensure the survival of newborns.
D) Reflexes exist due to learned behaviours, and thus they indicate how well our learning mechanisms are working.