Julio is forced to present his science project to the class. He HATES public speaking. From the descriptions below, when during his presentation did he do work? A) When he was standing motionless and gripped with fear at the front of the room. B) When he tightly gripped his cue cards in front of him. C) When he nervously blinked like a maniac without saying anything for several minutes. D) When he started bouncing up and down on his toes like a sick beat had just dropped