What Is the Evidence That a Newborn Infant Prefers the Sound

What is the evidence that a newborn infant prefers the sound of his/her own mother's voice to that of other women?

A) The infant learns to turn the eyes toward the mother's voice, but not toward another woman's voice.
B) Hearing another woman's voice causes the baby to cry.
C) The infant sucks harder when sucking turns on the sound of the mother's voice.
D) The infant smiles after hearing the mother's voice, but not another woman's voice.