What Were the Results of an Experiment in Which Infants

What were the results of an experiment in which infants heard a woman speak in either an adult­directed or an infant­directed manner?

A) infants preferred to look at a photograph of the woman who used adult­directed speech than at a photograph of an unfamiliar woman.
B) infants preferred to look at a photograph of the woman who used child­directed speech than at a photograph of an unfamiliar woman.
C) infants demonstrated no clear preference for individuals on the basis of their speech style.
D) infants were better able to learn words from the woman who used adult­directed speech.