Here's a problem to solve: John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water had evaporated and salt was visible at the bottom of the jar. This is an example of a

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

- A: physical change.
 
- B: chemical change.
 
- C: solute being dissolved.
 
- D: new substance being formed.
 