Group 2, I reckon. They started off with 100 mL vegetable oil, and group 2 ended up with 10+ of that, they also had an increase in engine oil. It was supposed to decrease like all of the other groups, but instead it increased like none of the groups.
Answer:It is known as a concentration gradient which in diffusion will always flow from ares of high concentration to areas of low concentrations
So i believe the answer to this is A.
Explanation:
Agriscience is the right answer :)