Astudent conducted an experiment to test the concept of semipermeability of a cell membrane. she has?

diffusion ( osmosis)

Explanation:

Recall that osmosis is the movement of water or liquid molecules from the region of low concentration to the region of high concentration until it's evenly distributed through a semipermeable membrane

so now it depends on the type of solution she use to check the permeability of the cell membrane

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."