A train is traveling and decelerating along a straight, horizontal track. An observer in the train holds a ball directly over a white spot on the floor of the train. She drops the ball when the train is moving at $60$ km$/$h$.$ She will observe the ball land

a$)$ in front of the white spot

b$)$ behind the white spot

c$)$ behind the white spot and slightly to the side

d$)$ right on the white spot