This is a test of commonsense with single/multi-choices. Complete the next sentence:

We see bmx racers on the field and in various locations and riding their bikes. two men

Pick your answer from:
(A). speak at the fence while adjusting the settings of the horses and helmets their using.;
(B). fall off their bikes.;
(C). ride horses together and we see the riders on the sideline.;
(D). are talking off screen.;
The answer is:
(B).