A bus driver is reversing his bus at a speed\[8\text{ }m\text{ }{{s}^{-1}}\]. The rear view mirror of a bus is a plane mirror. The driver sees in his rear view mirror the image of a car parked behind his bus. The speed at which the image of the car appears to approach the driver will be

• A.  \[2\text{ }m\text{ }{{s}^{-1}}\]                 
• B.  \[4\text{ }m\text{ }{{s}^{-1}}\]     
• C.  \[8\text{ }m\text{ }{{s}^{-1}}\]       
• D.              \[16\text{ }m\text{ }{{s}^{-1}}\]