Which of the following is the correct JSON snippet to define a simple scaling policy in AWS Auto Scaling?
A{"PolicyName": "ScaleOut", "PolicyType": "TargetTrackingScaling", "TargetValue": 50}
B{"PolicyName": "ScaleOut", "PolicyType": "StepScaling", "StepAdjustments": [{"MetricIntervalLowerBound": 0, "ScalingAdjustment": 1}]}
C{"PolicyName": "ScaleOut", "PolicyType": "SimpleScaling", "AdjustmentType": "ChangeInCapacity", "ScalingAdjustment": 2}
D{"PolicyName": "ScaleOut", "PolicyType": "ScheduledScaling", "Schedule": "cron(0 12 * * ? *)"}