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 assume or maintain all of the following ideas except:

A) Some peoples were not sufficiently innovative to develop their own cultural traits.
B) Inherent inferiority of different non-Western peoples was assumed.
C) Cultural traits that were diffused were part of the technological dimension of the society.
D) Cultural traits in the same geographical region would inevitably spread from one society to another.