Concept:Use coordinate geometry to track the final positions of both cars.Explanation:Take the starting point as (0,0).Car C moves 9 km South, so its position is (0,−9).Turning left from South means facing East.Car C then moves 11 km East, so C is at (11,−9).Car D moves 3 km East, so its position is (3,0).Then D moves 5 km South, giving (3,−5).Turning left from South means facing East.D then moves 8 km East, so D is at (11,−5).Comparing (11,−5) and (11,−9): the x-coordinates are equal, and −5>−9.So D is 4 km North of C.
