Based on His Observations That Contact Between Neighboring Tribes Had

Based on his observations that contact between neighboring tribes had existed since humanity's beginnings and covered enormous areas, Franz Boas argued

A) against treating cultures as isolated phenomena.
B) that even the earliest foragers engaged in warfare.
C) that language must have originated among the Neandertals.
D) that biology, not culture, was responsible for the vast majority of human diversity.
E) that general anthropologists were wrong to focus too much attention on biology.