Final answer:
The clause C) 'suddenly the lieutenant cried out' signifies a pivotal change in the events of the story from 'An Episode of War.'
Step-by-step explanation:
Within Stephen Crane's passage from "An Episode of War," the clause that indicates a change in the events of the story is C) suddenly the lieutenant cried out.
This moment signifies a shift in action and heightens the suspense, signaling that the lieutenant experiences something unexpected and potentially alarming, contrasting the methodical task of dividing coffee among soldiers.
This sudden cry disrupts the orderly scene and indicates a pivotal moment in the narrative.