The correct answer is C (MIN_DATA_RETENTION_TIME_IN_DAYS) because this parameter is specifically designed to set the minimum data retention period for Time Travel at the account level. The community discussion clearly supports this with multiple upvoted comments citing Snowflake documentation that confirms MIN_DATA_RETENTION_TIME_IN_DAYS is used to set the minimum data retention period for retaining historical data for Time Travel operations. Option A (DATA_RETENTION_TIME_IN_DAYS) is incorrect because it's set at the object level (database, schema, table) rather than the account level. Options B (MAX_DATA_EXTENSION_TIME_IN_DAYS) and D (MAX_CONCURRENCY_LEVEL) are unrelated to Time Travel data retention periods.