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

There are people standing and seated in the bleachers watching about twelve band students performing. Most of the players are drumming on the percussion instruments in a rhythmic tune. the percussion players

Choose your answer from:
+ begin to perform faster the slower they drum.
+ begin going round in a circle as they play the instruments.
+ are wearing black helmets.
+ are playing the drums run on the ground.
begin going round in a circle as they play the instruments.