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A company's web application, hosted on EC2 instances with an Application Load Balancer, must now be restricted to access from a single country as per new policy. What is the appropriate configuration to enforce this restriction?
A
Modify the EC2 instances' security group settings.
B
Adjust the Application Load Balancer's security group settings.
C
Implement AWS WAF on the Application Load Balancer within a VPC.
D
Change the subnet's network ACL where the EC2 instances are located.
