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AWS Certified Solutions Architect - Professional · AWS
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Option C
Option C
C for sure
https://docs.amazonaws.cn/en_us/AmazonCloudFront/latest/DeveloperGuide/LocationsOfEdgeServers.html If your origin is hosted on Amazon and protected by an Amazon VPC security group, you can use the CloudFront managed prefix list to allow inbound traffic to your origin only from CloudFront's origin-facing servers, preventing any non-CloudFront traffic from reaching your origin , imagine that your origin is an Amazon EC2 instance in the Europe (London) Region (eu-west-2). If the instance is in a VPC, you can create a security group rule that allows inbound HTTPS access from the CloudFront managed prefix list. This allows all of CloudFront's global origin-facing servers to reach the instance. If you remove all other inbound rules from the security group, you prevent any non-CloudFront traffic from reaching the instance