In simple diffusion,?

Question

a. the rate of movement of molecules is controlled by temperature and

pressure.

b. the movement of individual molecules is random.

c. the movement of molecules of one substance is independent of the

movement of any other substance.

d. the net movement is away from the region of highest concentration.

e. all of these

Answer 1

all of these

Answer 2

I think E is the best answer.