AWS Cost Explorer

Answer - D.

The AWS Documentation mentions the following.

Cost Explorer is a free tool that you can use to view your costs.

You can view data up to the last 12 months.

You can forecast how much you are likely to spend for the next 12 months and get recommendations for what Reserved Instances to purchase.

You can use Cost Explorer to see patterns in how much you spend on AWS resources over time, identify areas that need further inquiry, and see trends that you can use to understand your costs.

You also can specify time ranges for the data and view time data by day or by month.

For more information on the AWS Cost Explorer, please refer to the below URL:

http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-explorer-what-is.html

A, B and C are incorrect.

These services do not relate to billing and cost.

The correct answer is D. AWS Cost Explorer.

AWS Cost Explorer is a tool that allows you to visualize, understand, and manage your AWS costs and usage over time. It provides a range of features and tools that help you optimize your usage and identify potential cost savings. One of these features is the ability to forecast your AWS spending.

With AWS Cost Explorer, you can forecast your AWS spending based on historical data and usage patterns. This can help you to better plan your budget and ensure that you are allocating your resources effectively.

To use AWS Cost Explorer to forecast your spending, you need to first gather and analyze your historical data. You can do this by using the Cost and Usage Reports (CURs) or by setting up billing alerts and using the AWS Cost and Usage API.

Once you have your historical data, you can use the Cost Explorer console to create custom reports and visualizations that show you how your spending has changed over time. You can also use the forecasting tool to project your spending into the future based on your historical usage patterns.

Overall, AWS Cost Explorer is a powerful tool that can help you to optimize your AWS usage and control your costs. It provides a range of features and tools that make it easy to visualize, understand, and forecast your AWS spending, so that you can make informed decisions and allocate your resources more effectively.