The right option is; D. Made of cells.
.....chuck said it could not be any living thing because it was not made of cells.
Cell is the basic structural and functional unit of all living organisms. All living organisms are made up of many cells that functions together, and they are either unicellular or multicellular organisms. Cells contain several membrane bound organelles that perform different important functions within the cell. Distinct features that allow a cell to carry out its functions include; a cell membrane that keep the chemical reactions of life together, at least one chromosome that contains genetic material, and the cytoplasm (the content of the cell).