Here's a problem to solve: All organisms process nutrients. Which sentence best describes how plants and animals process nutrients similarly?

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

- A: Energy from sunlight produces nutrients.
 
- B: Nutrients increase the strength of cell walls.
 
- C: Cells break down nutrients into usable forms.
 
- D: Nutrients are broken down by the digestive system.
 