Here's a problem to solve: The structures found in a living cell can be compared to the parts of a factory that produces cars. Which part of the factory is most similar to the nucleus of a living cell?

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

- A: a conveyor belt that transports materials
 
- B: a storage bin that holds the pieces needed to assemble a car
 
- C: the computer room that controls the assembly process
 
- D: the generator that provides energy for the factory
 