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

People practice ballet in a studio alone and in couples. then

OPTIONS:
(1). , a man begins dancing and top dancing standing on the ground.;
(2). , a boy and a girl dance ballet, then a man enter and dance with the girl.;
(3). , the band performs ballet in the studio and in the open gathered.;
(4). , people dances and dances together, dancing.;
(2).