How Do We Know That Infants Remember the Sounds That

How do we know that infants remember the sounds that they heard prenatally?

A) After only a few days, newborn infants learn to attend to their mother's voice more than their fathers' voice.
B) Scientists have used microphones to record intrauterine fetal environment and picked up maternal sounds, such as the mother's voice.
C) When young children were asked to recall the sounds they heard prenatally, they mainly described hearing their mother's voice.
D) Mothers read passages from Dr. Seuss's The Cat in the Hat during pregnancy, and after birth their babies increased their sucking rate to the passages.
E) Researchers repeatedly played music to newborns and then observed that newborns who heard music responded differently than those who have not heard music.