How does inefficient transfer of energy among trophic levels result in the typically high endangerment status of many top-level predators?
a. Top-level predators are destined to have small populations that are sparsely distributed.
b. Predators have relatively large population sizes.
c. Predators are more disease-prone than animals at lower trophic levels.
d. Top-level predators are more likely to be stricken with parasites.