Final answer:
The unexpected event disrupting the town on a sunny morning is not detailed among the options given and would likely be specific to a story's context, such as Shirley Jackson's 'The Lottery,' where the lottery event itself causes disruption.
Step-by-step explanation:
The unexpected event that disrupts the peaceful town on the clear sunny morning of June 27th is not specified among the provided choices, as the question appears to derive from a literary context or requires understanding of a specific narrative. For an accurate answer, the question should reference the particular work of literature or context in which the event occurs. However, if this relates to Shirley Jackson's short story 'The Lottery,' then the correct answer would be none of the provided options, as the unexpected event would be the lottery itself, which ends with a stoning.
If we speculate on what unexpected event could disrupt a peaceful town, possible options might be a sudden earthquake, a mysterious power outage, or an extraordinary weather event like a supernova visible during daytime that could spark widespread fear and superstition.