In North American forests, two species of birds, nuthatches and brown creepers, forage on the same trees for insects. Brown creepers feed on insects found near the bottom of the tree trunk, while nuthatches feed on insects in the top part of the tree. The difference in foraging behavior most likely affects the nuthatches and brown creepers by -


A) Establishing dominance between the birds for nesting sites


B) Reducing competition between the birds for resources

B) Allowing the birds to avoid many types of predators

C) Preventing the birds from interbreeding with each other