Here's a problem to solve: When Chemical X is added to a certain liquid, the chemical breaks into Substances Y and Z. It is not possible to break Substances Y and Z into simpler particles. Which statement is best supported by this evidence?

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

- A: Chemical X is an element.
 
- B: Chemical X is soluble in water.
 
- C: Substances Y and Z are elements.
 
- D: Substances Y and Z are compounds.
 