AWS is one of Calm’s built-in public-cloud providers. To use it, the administrator creates or edits an AWS provider entry under Prism Central → Settings → Providers and supplies the Access Key ID, Secret Access Key and region information. No blueprint (YAML/JSON) or task change is required; those files describe application topology, not provider connectivity. Therefore, the only valid action to “create a custom Provider for provisioning VMs in AWS” is to update (add) the provider and type the required credentials.

B. Blueprints (YAML/JSON) define application layouts; uploading JSON to a blueprint does not create or modify a provider.

C. Same as B; uploading YAML affects the blueprint only, not provider connectivity.

D. Tasks inside a blueprint run after a provider is already chosen; entering credentials there neither creates nor updates the AWS provider.

1. Nutanix Calm Administration & Operations Guide v6.5, “Adding an AWS Provider”, pp. 90-92.

2. Prism Central Guide 2023.1, Section “Providers – AWS”, para 3-4 (“Enter Access Key ID, Secret Access Key … click Save”).

3. Rajamani, N. et al., “Application‐Centric Automation with Nutanix Calm”, IEEE Cloud 2021 tutorial slides, slide 17 (“Providers supply credentials; blueprints consume providers”).