769.A median island is installed in the center of the road, with 'Keep Right' and 'Keep Left' compliance signsplaced at each end of the median island respectively. Which of the following descriptions of theirplacement is correct?
(A) Both signs are placed on the same side, and the driver chooses which one tofollow based on vehicle speed.
(B) The 'Keep Right' sign is placed at the approaching end, directingvehicles to pass on the right side; the 'Keep Left' sign is placed at the departing end, guiding vehiclesback to their original lane.
(C) Both signs serve the same function; the arrows point in opposite directionsonly because the road runs in different directions, without affecting the actual travel route.