Answer:
D. The organelles are enclosed in membranes
Explanation:
One defining characteristic of eukaryotes is that they have membrane-bound organelles. If a cell lacks a water-storing vacuole, that could mean it is a prokaryote too. If a cell lacks a Golgi apparatus, it can never be a eukaryote. RIbosomes are characteristics of both prokaryotes and eukaryotes. D. is the best evidence that the cell is a eukaryote.