What happens next?

A large semi truck is driving in the rain. Then we see boys riding skateboards outside a house. they

OPT:
(a). perform several stunts on a board in the driveway.
(b). enter into a competition and begin skateboarding.
(c). are shown performing stunts in the track.
(d). perform stunts on the skateboards laying down on their backs in the rain.
(a).