Here's a problem to solve: A student has a pink eraser on her desk. Which property shows that the eraser is a solid?

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

- A: Its color stays the same when it is broken in half.
 
- B: Its temperature goes up when it is rubbed on paper.
 
- C: Its shape is definite when it is placed in a new spot.
 
- D: Its size changes when it is used to remove pencil marks.
 