Why Are Big, Fierce Animals Rare

Why are big, fierce animals rare?

A) Nutrients are preferentially lost from one trophic level to the next.
B) Available energy is greatly reduced from one trophic level to the next.
C) The evolution of the hunting strategy has limited the evolution of predators.
D) Energy lost in the prey strategy limits the energy that can be transferred to higher trophic levels.
E) All of the above are correct.