What happens next in this paragraph?

Weightlifters representing several countries are in a room. Many large men lift a heavy barbell in the competition, one after the other. they
OPT: (I). hold the barbell over their head, and then receive a score on their efforts.; (II). bend over and lift weight to their shoulders.; (III). stop for a moment to drink from a machine.; (IV). lift the weight up to their chest together, threw it down to the ground.;
(I).