cell therory state that all living things are composed of cells, and are the basic units of life. Why do scientists refer to it as cell theory instead of cell hypothesis?

A Since we haven't checked every organism for ourselves, we cannot call it hypothesis.

B It explains what happens in cells, so it cannot be a hypothesis.

C All of the evidence collected supports the idea of why we believe this

D It is an idea that is held by more than just one scientist

PLZ help ​