Answer:
B, A, C, D
Explaination:
You mixed up A and B while doing the question originally, I believe.
Diffusion is the movement of <em>solutes</em> from a higher concentration to a lower concentration.
It is important not to confuse this with <em>osmosis</em>, which refers to the movement of water only (from a lower concentration solution to a higher concentration solution.)
Diffusion and osmosis almost always goes hand-in-hand. A good way to remember this is if you imagine mixing a powdered juice drink. Diffusion talks about the powder's movement while osmosis talks about the water's movement.
