Multi-select problem: How does the next paragraph end?

This man is in the public gym to workout and he is standing on the treadmill just walking. there

Options are:
[a]. is also other people walking around farther around behind him..
[b]. are dodges and kickboxing movements doing the same moves as the man is..
[c]. is a man doing curves on the treadmill, after different scenarios are shown that he is doing crunches on the machine..
[d]. is a closeup of his starting position which includes legs and at times he lifts one leg to better balance on the treadmill..
[a].