Azure resource groups are created using the Azure CLI command az group create. The --name parameter specifies the resource group name, and --location defines the Azure region. Option A uses the correct CLI prefix (az), command group (group create), and valid parameters. Options B, C, and D are incorrect due to invalid command abbreviations or incorrect CLI prefixes (azure instead of az). Creating a resource group is a foundational step in the Release and Deploy stage, as it provides a logical container for AKS clusters, networking components, and related resources, enabling organized, secure, and manageable deployments.

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