What Is the Difference Between Relocation Diffusion and Expansion Diffusion

What is the difference between relocation diffusion and expansion diffusion?

A) Relocation diffusion is the spread of geographic phenomena from one area to another through an additive process and expansion diffusion is the spread of geographic phenomena through the physical movement from one area to another
B) Relocation diffusion spreads rapidly while expansion diffusion spreads slowly
C) Expansion diffusion is the spread of geographic phenomena from one area to another through an additive process and relocation diffusion is the spread of geographic phenomena through the physical movement from one area to another
D) Relocation diffusion expands first to key people or places and then gradually throughout the rest of the population or an area, while expansion diffusion does not
E) None of the above