Which of the Following Is NOT True of Optimal Foraging

Which of the following is NOT true of optimal foraging theory (OFT) ?

A) It assumes that natural selection has favored feeding behaviors that maximize fitness.
B) It assumes that animals are optimal while feeding.
C) Many OFT models assume fitness is a positive function of energy intake rate.
D) The behavior predicted by OFT models is called the optimal behavior.
E) One example of an OFT model is the marginal value theorem.