A cat runs along a straight line (the x-axis) from point A to point B to point C, as shown in the figure. The distance between points A and C is 5.00 m, the distance between points B and C is 10.0 m, and the positive direction of the x-axis points to the right. As the cat runs along the x-axis from point A to point B to point C, when in C, the cat's displacement from its starting point is: B O - 15.0 m O -5.00 m O 5.00 m 15.0 m