You are migrating a three-tier application architecture from on-premises to Google Cloud. As a first step in the migration, you want to create a new Virtual Private Cloud (VPC) with an external HTTP(S) load balancer. This load balancer will forward traffic back to the on-premises compute resources that run the presentation tier. You need to stop malicious traffic from entering your VPC and consuming resources at the edge, so you must configure this policy to filter IP addresses and stop cross-site scripting (XSS) attacks. What should you do?
A. Create a Google Cloud Armor policy, and apply it to a backend service that uses an unmanaged instance group backend.
B. Create a hierarchical firewall ruleset, and apply it to the VPC’s parent organization resource node.
C. Create a Google Cloud Armor policy, and apply it to a backend service that uses an internet network endpoint group (NEG) backend.
D. Create a VPC firewall ruleset, and apply it to all instances in unmanaged instance groups.
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