For the provided UNION ALL query:
* Option C: It will return rows from both SELECT statements including duplicate rows.
* UNION ALL is used to combine the results of two SELECT statements and does not eliminate duplicates.
Options A, B, and D are incorrect because:
* Option A: UNION ALL does not eliminate duplicate rows, unlike UNION.
* Option B: This would be true for INTERSECT, not UNION ALL.
* Option D: This would be true for EXCEPT or MINUS, not UNION ALL.