Four cars $A$,$B$,$C$ and $D$ are moving on a levelled road. Their distance versus time graphs are shown in the figure. Choose the correct statement.

• A
  Car $A$ is faster than car $D$.
• B
  Car $C$ is the slowest.
• C
  Car $D$ is faster than car $C$.
• D
  Car $B$ is the slowest.