According to Bergmann's Rule

According to Bergmann's rule,

A) hominins such as Cro-Magnons were capable of symbolic thinking, because they buried their dead with flowers.
B) plants and animals that live at the same time evolve together.
C) animals in colder regions have bulkier body builds.
D) variation exists because of genetic inheritance.
E) the longer two populations have been separated, the more genetically disparate they will be.