Here's a problem to solve: Cells are the basic unit of structure and function in all living organisms. Which describes the greatest difference between the cells of a baby gorilla and the cells of an adult gorilla?

Among the 4 following options, which is the correct answer?

- A: The adult has more cells than the baby.
 
- B: The baby has simpler cells than an adult.
 
- C: The baby has smaller cells than the adult.
 
- D: The adult has different types of cells than the baby.
 