The tiny hummingbird weighs little, but its egg is 15 percent of the adult hummingbird' s weight. The volume and weight of an adult goose are much greater than those of a hummingbird, but a goose' s egg is only about 4 percent of its own weight. An adult ostrich, much larger and heavier than a goose, lays an egg that is only 1. 6 percent of its own weight. Which one of the following propositions is best illustrated by the statements above?
A: The eggs of different bird species vary widely in their ratio of volume to weight.
B: The smaller and lighter the average adult members of a bird species are, the larger and heavier the eggs of that species are.
C: The ratio of egg weight of a species to body weight of an adult member of that species is smaller for larger birds than for smaller ones.
D: The size of birds' eggs varies greatly from species to species but has little effect on the volume and weight of the adult bird.
Choose A, B, C or D as your solution.
C