Consider This Statement: "Charles Darwin Hypothesized That Humans and Dogs

Consider this statement: "Charles Darwin hypothesized that humans and dogs have evolved similar emotional expressions on the face, as in human and canine displays of anger. He based this hypothesis on observations that anger expressions in humans involve a pulling back of the lips to reveal the teeth, similar to the way dogs show their canine teeth in aggressive displays." The presentation of _____ make(s) this a basic argument.

A) animals
B) a theory
C) observations as evidence supporting the hypothesis
D) an evolutionary theory about anger that has not been proven