Why Would You Expect Some White-Fronted Bee-Eaters to Fly Very

Why would you expect some white-fronted bee-eaters to fly very far away from their nests to forage when there are food sources nearby? Base your answer on your knowledge of cost-benefit analyses,

A) There might be some plentiful food sources further away.
B) Competition for food is too intense near the nest.
C) Food near the nest is usually of lower quality.
D) Predation is highest closest to the nest.