Allen's rule states that mammals from colder climates have shorter ears and appendages than individuals of the same species from warmer areas. The related Bergman's rule states that mammal body size varies with latitude, with larger body size in populations located closer to the poles and smaller body size in populations located closer to the equator. Both Allen's and Bergman's rule has to do with the fact that
A. larger bodies can store proportionally more fat as insulation than smaller bodies.
B. smaller bodies can store proportionally more fat as insulation than larger bodies.
C. larger bodies have a proportionally smaller surface area, and heat radiation varies with surface area.
D. larger bodies have a proportionally smaller surface area, and heat radiation varies with volume.
E. smaller bodies have a proportionally smaller surface area, and heat radiation varies with surface area.
Answer: C