A daily pipeline exits successfully, but a dashboard shows data from three days ago because the source has not delivered recent records. Which quality check most directly detects this condition?

1. Check only the most recent output object modification time, even when the job repeatedly rewrites old business records.
2. Compare the latest relevant business event or source-delivery timestamp with the required freshness window.
3. Check only that the output folder contains at least one file of any age.
4. Count only how many times the scheduler started the job.