How long will they wait till the dinner be over（）

A. in whose honour the state dinner was given
B. whom the state dinner was given in honour
C. for whom the state dinner was given honour
D. whose honour the state dinner was given

A．it can locate the vehicle within a few feet
B．it can show where the vehicle is relative to the destination the driver wants to reach
C．after being told the destination, the computer locates it and directs the driver to it
D．after being told the destination, the computer can offer the driver alternative routes if needed