Cowbirds utilize fragmented forests effectively by
A) feeding on the fruits of shrubs that tend to grow at the forest/open-field interface.
B) parasitizing the nests of forest birds, and feeding on open-field insects.
C) roosting in forest trees, and nesting in grassy fields.
D) outcompeting other songbird species in fragmented communities.
E) using forest cover to escape from predators in their normal grassland habitat.
