The Textbook Authors Describe an Experiment in Which Researchers Exposed

The textbook authors describe an experiment in which researchers exposed infants who previously heard only English spoken in their home to a tape of their mothers speaking to them either approvingly or disapprovingly in German. The tape was activated while the infants played with a novel toy. What were the results of this experiment?

A) Infants who heard the disapproving tone in German would drop the toy, but those who heard the approving tone in German would continue playing with the toy.
B) Infants who heard the German tape of their mothers became confused, alternatively picking the toy up and putting it down randomly, thereby demonstrating the importance of language-specific phonemes.
C) Infants kept right on playing with the toy regardless of the tones of their mothers' voices.
D) Infants stopped playing with the toy regardless of the tones of their mothers' voices.