In Police Department of Chicago v. Moseley (1972) the Supreme Court struck down an ordinance that prohibited picketing within 150 feet of any school building while classes were in session because: O The regulation allowed for protesters to be too close to school buildings and would disrupt classroom teaching. O The regulation exempted union picketing and therefore was not content neutral. O The government could have achieved its goals even if picketers were just 100 feet away from buildings. O The regulation applied to all picketing but should have made an exception for union picketing involving teacher strikes. O The regulation did not ensure adequate access to the intended audience.