Brown-Headed Cowbird Populations Require Forested Habitat Where They Can

Brown-headed cowbird populations require forested habitat where they can

A) parasitize the nests of other forest-adapted host birds.
B) burrow for insect larvae under the bark of trees.
C) nest in cavities in old growth timber.
D) avoid competition with other open area cowbird species.
E) feed on upper canopy-adapted insect species.