Answer: A. AWS Pricing Calculator

The correct answer is A, the AWS Pricing Calculator. This tool allows users to estimate the cost of AWS services before actually provisioning any workloads. It's a web-based planning tool that helps in modeling solutions, exploring service price points, and reviewing calculations behind estimates. This is particularly useful for planning how to spend on AWS, identifying cost-saving opportunities, and making informed decisions. The other options, such as the AWS Cost and Usage Report, Cost Explorer, and AWS Budgets, are more focused on analyzing past usage and costs, forecasting based on usage patterns, and setting budgets and alerts, respectively, rather than estimating costs before provisioning workloads.

Author: LeetQuiz Editorial Team