Which county reported the most number of school closure in the 1980s with school wonership code belonging to Youth Authority Facilities (CEA)?
Youth Authority Facilities (CEA) refers to SOC = 11; 1980s = years between 1980 and 1989
SELECT County FROM schools WHERE strftime('%Y', ClosedDate) BETWEEN '1980' AND '1989' AND StatusType = 'Closed' AND SOC = 11 GROUP BY County ORDER BY COUNT(School) DESC LIMIT 1