Answer:
[tex]\boxed {\tt C. \ Vacuole}[/tex]
Explanation:
Let's analyze each answer choice.
A. Nucleus
B. Cytoplasm
C. Vacuole
D. Chloroplast
Based on the functions of each organelle, we can assume the best answer is C. Vacuole. Vacuoles store substances, so these organelles would hold water.