Multi-choice problem: Continue writing the next sentence in this paragraph:

There's a dirt biking event going on which is sponsored by monster energy drink. there

Select from the following.
 +are a lot of participants trying to push themselves forward in order to take off the falling dirt.;
 +is 2 people on biking bikes and they have fur on their legs.;
 +are several contestants participating in the event.;
 +'s a gate open and people are riding bikes and playing sports on the track.;
are several contestants participating in the event.