Please choose the correct ending to complete the given sentence: Cheerleading: . a large group of high school cheerleaders in a large indoor gym

Ending1: practice hurling while high bungee jumping in unison. Ending2: run up and down. Ending3: are in two different groups on the left and right and they immediately begin their cheer routine that includes flips and cheers that are mostly in unison. Ending4: started running to perform high kicks and passes performed in front of a large crowd and a large audience in the audience watching on.

Answer format: ending1/ending2/ending3/ending4