What Is the Evidence That the Soothing Function of Sucking

What is the evidence that the soothing function of sucking need not be learned through experience?

A) Babies mimic the sucking motion when at rest or during sleep.
B) As a baby outgrows colic, their rooting reflex also strengthens.
C) Babies who cry incessantly or become easily agitated typically show a weak rooting reflex at birth.
D) Sucking on a pacifier decreases crying and agitated movement in hungry neonates.