Write the next sentence in the following story.

There are several other bikers doing the same activity on another curved surface. There are five bikers wearing helmets standing ready to start a race. they

Available options: (A). begin their race on the dirt and the crowd cheers loudly.; (B). begin to race through the dirt as they do several flips and turns on the little jump bikes riding with their wheels.; (C). go to the edge of the track.; (D). begin racing at high speed over a curved road.;. The answer should be
(D).