A SysOps Administrator manages a website running on Amazon EC2 instances behind an ELB Application Load Balancer. Users visiting the load balancer’s DNS address in a browser are reporting errors. The administrator has confirmed:

• The security groups and network ACLs are correctly configured.
• The load balancer target group shows no healthy instances.

What should the Administrator do to resolve this issue?

A. Review the application’s logs for requests originating from the VPC DNS address.
B. Review the load balancer access logs, looking for any issues or errors.
C. Review the load balancer target group health check configuration.
D. Review the load balancer listener configuration.