Answer: 31 days

The correct answer is 31 days based on Snowflake's documented behavior for persisted query results. According to the official documentation and community consensus, each time a persisted query result is reused, Snowflake resets the 24-hour retention period, but this extension can only occur up to a maximum of 31 days from the original query execution date. After 31 days, the result is automatically purged regardless of usage frequency. The community discussion shows 100% agreement on option C, with multiple users citing the official documentation and upvoted comments confirming this maximum retention period.

Author: LeetQuiz Editorial Team