A. Change the Auto Scaling configuration to replace the instances when they fail the load balancer’s health checks.
B. Change the target group health check HealthCheckIntervalSeconds parameter to reduce the interval between health checks.
C. Change the target group health checks from HTTP to TCP to check if the port where the application is listening is reachable.
D. Enable the available memory consumption metric within the Amazon CloudWatch dashboard for the entire Auto Scaling group. Create an alarm when the memory utilization is high. Associate an Amazon SNS topic to the alarm to receive notifications when the alarm goes off.
E. Use the Amazon CloudWatch agent to collect the memory utilization of the EC2 instances in the Auto Scaling group. Create an alarm when the memory utilization is high and associate an Amazon SNS topic to receive a notification.