Write SQL query to solve given problem: Among the reference ID of under 10 who got response by marketing department, compare their education status.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.EDUCATIONNUM FROM Customers AS T1 INNER JOIN Mailings1_2 AS T2 ON T1.ID = T2.REFID WHERE T2.REFID < 10 AND T2.RESPONSE = 'true'