Answer:
The correct answer is option D. a cube.
Explanation:
Epithelium cells are type of cells that has a simple cuboidal epithelium that consists of only a single layer of cells that are cube-like or cuboidal in shape. In the question given cell is similar to these cells.
These cells have large, spherical nuclei present in the center. These cells are cube-shaped cells which support the option D to be correct.
Thus, the correct answer is option D. a cube.