Which White-Crowned Sparrow Will Only Sing the Species-Typical Song in Adulthood

Multiple Choice

Which white-crowned sparrow will only sing the species-typical song in adulthood?

A) A male raised in isolation and exposed to tapes of lark sparrow song before 2 months of age
B) A male raised in isolation and exposed to tapes of lark sparrow song at 6 months of age
C) A male raised in isolation and exposed to tapes of white-crowned sparrow song before 2 months of age while housed next to an adult male lark sparrow
D) A male raised in isolation, exposed to tapes of white-crowned sparrow song before 2 months of age, and deafened after his song has crystallized
E) A wild-caught female that heard her father sing while she was a nestling