What are possible causes for this problem?

A company is managing a website with a global user base hosted on Amazon EC2 with an Application Load Balancer (ALB). To reduce the load on the web servers, a SysOps administrator configures an Amazon CloudFront distribution with the ALB as the origin After a week of monitonng the solution, the administrator notices that requests are still being served by the ALB and there is no change in the web server load.

What are possible causes for this problem? (Select TWO.)
A . CloudFront does not have the ALB configured as the origin access identity.
B . The DNS is still pointing to the ALB instead of the CloudFront distribution.
C . The ALB security group is not permitting inbound traffic from CloudFront.
D . The default, minimum, and maximum Time to Live (TTL) are set to 0 seconds on the CloudFront distribution.
E . The target groups associated with the ALB are configured for sticky sessions.

Answer: B,D