Which of the following statements, from the cell theory, best supports the idea that viruses are non-living?

Sticker With A Dead Green Coronavirus Stock Illustration - Illustration of green, cartoon: 176981141

a
All animals are composed of cells.
b
All cells are produced from other cells.
c
All viruses are composed of one nucleic acid and protein.
d
All Living things are composed of cells.

d "All Living things are composed of cells."