单选题 According to the author, an unborn baby ______.

A、 is unable to identify his mother' s lullaby after birth
B、 is able to identify his mother' s voice rather than that of others'
C、 is able to help release adrenaline and other stress-related hormones
D、 is able to distinguish French accent from Russian accent

【正确答案】 B

【答案解析】根据DeCasper的实验结果可知选项B正确。