AWS Pricing Calculator is the correct choice because it lets teams generate forward looking, itemized cost estimates for AWS services so leadership can compare projected cloud charges to current monthly data center spend.

AWS Pricing Calculator enables modeling of architectures and usage patterns and it produces line item estimates for services and configurations so you can present a migration cost comparison that mirrors your on premises environment.

AWS Cost Explorer is geared toward analyzing historical and forecasted spend for resources already running in an AWS account and it is not intended to create pre migration pricing models for an on premises versus cloud comparison.

AWS Trusted Advisor offers best practice checks and cost optimization recommendations for deployed resources but it does not generate forward looking cost estimates for a planned migration.

AWS Budgets is used to set thresholds and receive alerts for cost or usage after you begin consuming AWS services and it does not provide a pricing calculator for prospective moves.

Full AWS Practitioner Certification Question