Which of the Following Statements About Song Learning in Male

Multiple Choice

Which of the following statements about song learning in male white-crowned sparrows is true?

A) Only one critical period is involved.
B) As long as the birds hear the species-specific song as adults, they acquire the ability to produce it, even if they were not exposed to the song as nestlings.
C) Nestlings hear the songs of other species of birds but do not sing those songs.
D) All of the above
E) None of the above