Here's a problem to solve: Two balls rolled down two identical inclined planes. The balls were exactly the same mass and size, but one ball rolled down the inclined plane faster. Identify a possible reason that one ball rolled faster than the other ball.

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

- A: One ball was red and the other ball was blue.
 
- B: One ball was new and the other ball was old.
 
- C: One ball was shiny and the other ball was dull.
 
- D: One ball was sticky and the other ball was smooth.
 