What happens next?

A woman is seen speaking to the camera while pointing to an exercise bike. sh

Available choices:
[A]. men are seen installing grips around the bike's tire and then screwing in the tire..
[B]. it shows the man working out on the machine..
[C]. is shown preparing the machine and begins riding towards the camera..
[D]. adjusts the settings on the bike and climbs on top to begin riding..
[D].