Write SQL query to solve given problem: Among businesses with "Wi-Fi" attribute, which businesses id are located at SC State?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T3.business_id FROM Attributes AS T1 INNER JOIN Business_Attributes AS T2 ON T1.attribute_id = T2.attribute_id INNER JOIN Business AS T3 ON T2.business_id = T3.business_id WHERE T1.attribute_name = 'Wi-Fi' AND T2.attribute_value = 'true' AND T3.state = 'SC'