This is probably a joke but I'll answer anyway
By 'cheeks' they mean buttocks so by "making them clap" is referring to them being so big/thick that they clap or make noise when you walk or move around or something.
I probably got played lol but whatever
The correct answer would be C
The number of people can range anywhere between 2-20 people and the performances are usually done in a line formation with interesting patterns of where people are placed.
I think that three steps are purchasing, selecting, presenting
