Here's a problem to solve: Which of these activities will result in a different kind of material being formed?

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

- A: A nail is left outside and it rusts.
 
- B: A glass is dropped and it shatters into small pieces.
 
- C: A rubber band is stretched until it breaks.
 
- D: A pencil is sharpened to a point.
 