Which of the following statements regarding billing, cost optimization and cost management in AWS is accurate?

Answer options:

A.When considering migrating to the cloud, the AWS Total Cost of Ownership (TCO) calculator is guaranteed to save up to 80% of the cost of running on-premise infrastructure.
B.In AWS Budgets, utilizing Cost and Usage budgets will optimize and reduce the overall spend by 79%.
C.The AWS Pricing Calculator will workout a revised bill that can reduce the overall spend by 60% if you commit to a long-term usage plan.
D.When using Savings Plans, 72% savings can be made on Amazon EC2, AWS Fargate, and AWS Lambda usage.

Correct Answer: D
Savings Plans are flexible discount pricing models that offer reduced rates if the customer commits to one year or three-year consistent usage. These are confined to Amazon EC2, AWS Fargate, and AWS Lambda usage.
https://docs.aws.amazon.com/savingsplans/latest/userguide/what-is-savings-plans.html
Option A is INCORRECT because the AWS Total Cost of Ownership (TCO) calculator is an estimation tool. It does not guarantee saving up 80% of the cost of running on-premise infrastructure. However, the tool allows the customer to estimate and anticipate their total AWS spend according the their use case.
Option B is INCORRECT because in AWS Budgets, utilizing Cost and Usage budgets will give the customer foresight into how much they would like to use and spend on their AWS services. Utilizing this service will not reduce the overall spend by an exact percentage. Therefore this statement is inaccurate.
Option C is INCORRECT because the AWS Pricing Calculator does not revise the customer bill. It allows the customer to derive an estimation of the cost of their AWS resources before the costs are incurred. Therefore this statement is inaccurate.