1) The bus driver yelled at Christian for singing too loudly. (2) When the bus driver turned back around to drive, Christian started to hum but the driver yelled at him again. (3) Christian started tapping his foot instead. (4) Before the driver could yell at Christian again, the other kids started tapping their feet. (5) By the time they got to school, all the bus passengers were stomping their feet.
Which sentence is a run-on sentence?
