How Does Facilitated Diffusion Differ from Simple Diffusion

Multiple Choice

How does facilitated diffusion differ from simple diffusion?

A) Facilitated diffusion expends no ATP.
B) Facilitated diffusion moves molecules from an area of higher concentration to lower concentration.
C) The rate of solute transport cannot increase indefinitely in facilitated diffusion.
D) The concentration gradient is never eliminated in facilitated diffusion.
E) Facilitated diffusion is independent of carrier molecules.