Which Statement About the Impact of Testosterone on Brains of Adult

Which statement about the impact of testosterone on brains of adult songbirds is false?

A) Increases in circulating testosterone in spring cause increases in the size of brain regions in adult males.
B) Adult females injected with testosterone in spring sing their species-specific song.
C) Under normal circumstances, adult females lack the hormonal stimulation to sing in spring.
D) Increases in the size of brain regions due to rising levels of testosterone reflect increases in size and number of neurons.
E) Females fail to form a memory of their species-specific song as nestlings.