Two cars moving in opposite directions cover the same distance $d$ in one hour. If the cars were moving in a north-south direction,what will be their displacement in one hour?

(D) Displacement is a vector quantity defined as the shortest distance between the initial and final positions of an object in a specific direction.
Since both cars cover the same distance $d$ in one hour in opposite directions (north and south),their displacement will be $d$ towards the north for the first car and $d$ towards the south for the second car.