What Characteristic Do Simple Diffusion and Facilitated Diffusion Share

Multiple Choice

What characteristic do simple diffusion and facilitated diffusion share?

A) Both require cellular energy for the transport of substances.
B) Both move water across a semipermeable membrane.
C) Both require a special carrier molecule to move substances across the membrane.
D) Both move a substance from a region of higher concentration to one of lower concentration without using cellular energy.