Answer:
The answer is B.
Step-by-step explanation:
Diffusion can be described as the movement of molecules according to their concentration in a certain environment, and this movement usuallt occurs from the environment with the high concentration towards the environment with the high concentration.
In a world where organisms can augment diffusion to make molecules move faster, the answer would be B, because of the lack of need to develop methods and organels that control diffusion and manipulate it, the organism would be small and simple.
I hope this answer helps.