Write the next sentence in the following story.

A line of bikers prepare for a dirt bike race. they

Possible answers:
[1]. ride on and on, quickly adjusting their mounts.
[2]. take off, racing over hills and around sharp corners, some falling off their bikes and kicking it angrily.
[3]. take off in bicycles straight across the dirt race track.
[4]. race each other until one starts off with a straight stroke.. The answer should be
[2].