For the process of diffusion to occur, molecules must
A. move from areas of high concentration to areas of lesser concentration until an equilibrium is reached.
B. move from areas of low concentration to areas of higher concentration until an equilibrium is reached.
C. remain stationary until their molecular motion allows for an equilibrium to be reached.
D. move from areas of high concentration to areas of lesser concentration until facilitated transport can assist the molecular equilibrium.
E. move from areas of high concentration to areas of lesser concentration until an equilibrium is reached by active transport.
Answer: A