Answer:
All vital functions of an organism occur within its cells
Step-by-step explanation:
WHY THE OTHER CHOICES ARE PART OF THE CELL THEORY
1st choice- When a cell reproduces, it splits. This means that BOTH of the cells are exactly the same.
2nd choice- ALL organisms, from bacteria to elephants are made of cells, either multicell or unicell
3rd choice- Cells split to reproduce, so yes