Investigations of Newborn Infants' Ability to Discriminate Among Different Tastes

Investigations of newborn infants' ability to discriminate among different tastes reveals that:

A) newborn infants are only able to discern differences among sweet and not-sweet flavors.
B) newborn infants are able to discriminate among sweet, bitter, salty, and sour tastes.
C) newborn infants demonstrate a clear preference for salty flavors.
D) it is difficult to identify infants' perceptual abilities in this area because they show no outward reaction to varying tastes.