In Order for Diffusionism to Work as Envisioned by the British

In order for diffusionism to work as envisioned by the British and German schools, adherents had to maintain that __________.

A) some peoples were not sufficiently innovative to develop their own cultural traits
B) Western and non-Western peoples were inherently equal
C) the cultural traits that were diffused were part of the technological dimension of the society
D) cultural traits in the same geographical region did not inevitably spread from one society to another