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In Google Cloud Platform (GCP), resources are organized hierarchically using organization nodes, folders, and projects. Cloud Identity and Access Management (IAM) allows you to set policies at each of these levels. Considering this hierarchical structure, when different IAM policies are applied at these various levels, what determines the effective policy at a specific node within the hierarchy?
A
The effective policy is determined only by the policy set at the node
B
The effective policy is the policy set at the node and restricted by the policies of its ancestors
C
The effective policy is the union of the policy set at the node and policies inherited from its ancestors
D
The effective policy is the intersection of the policy set at the node and policies inherited from its ancestors