You Have Just Recently Deployed an Application on EC2 Instances

Multiple Choice

You have just recently deployed an application on EC2 instances behind an ELB. After a couple of weeks, customers are complaining on receiving errors from the application. You want to diagnose the errors and are trying to get errors from the ELB access logs. But the ELB access logs are empty. What is the reason for this.

A) You do not have the appropriate permissions to access the logs
B) You do not have your CloudWatch metrics correctly configured
C) ELB Access logs are only available for a maximum of one week
D) Access logging is an optional feature of Elastic Load Balancing that is disabled by default