You read that a foraging tactic is "optimal" only if it is the most efficient way of acquiring calories from the environment. This is _______ because _______.

A) true; this will enable the species to grow and avoid extinction
B) true; selection favors traits that have large benefits
C) false; species that collect food too efficiently run the risk of destroying the resource base needed for that species
D) false; sometimes animals gain more fitness by sacrificing some foraging efficiency in order to better avoid predators