The graph below shows the speed of an object through time.

Which of the following scenarios describes an object whose motion could be represented by the graph above?
A.
A rocky objects hurtles through outer space at a constant speed of 100 m/s.
B.
A race car moves along a straight stretch of track at a constant speed of 100 miles per hour.
C.
A rocket starts from rest and launches into the air, reaching a speed of 100 m/s after 5 seconds.
D.
A jet airplane lands with an initial speed of 100 m/s and slows down to 0.0 m/s after 5 seconds.

D. A jet airplane lands with an initial speed of 100 m/s and slows down to 0.0 m/s after 5 seconds.