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

One person is shown doing a set of jump rope tricks. Two people are then shown doing more jump rope tricks. next

pick from the following.
A). they are shown going back and forth and end by holding their arms on a side..
B). , four people are shown doing jump rope tricks in the gymnasium..
C). , a boy is shown doing a series of quick jumps on stilts..
D). , the jump staff appears, giving instructions how far they need to perform..
B).