Do all eukaryotic cells contain a cell wall

Many kinds of prokaryotes and eukaryotes contain a structure outside the cell membrane called the cell wall. With only a few exceptions, all prokaryotes have thick, rigid cell walls that give them their shape. Among the eukaryotes, some protists, and all fungi and plants, have cell walls.

the answer is c) abandoned properties that are contaminated with hazardous materials.

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying