The correct command uses 'update-auto-scaling-group' with '--default-cooldown' option.
Step 2: Match the correct syntax
aws autoscaling update-auto-scaling-group --auto-scaling-group-name my-asg --default-cooldown 300 matches the official syntax to set cooldown to 300 seconds.
Final Answer:
aws autoscaling update-auto-scaling-group --auto-scaling-group-name my-asg --default-cooldown 300 -> Option B