The Brains of Female Zebra Finches Lack the Hormonal Influences

The brains of female zebra finches lack the hormonal influences that occur in the brains of males. As a result, what changes are seen in the female brains? ​

A) auditory processing centers are especially well-developed in females ​
B) more neurons are produced in the higher vocal center ​
C) increased transcription of genes whose products are involved in memory retention
D) the number of neurons in the higher vocal center declines
E) octopamine levels increase, stimulating neural transmissions