The use of what AWS feature or service allows companies to track and categorize spending on a detail

The use of what AWS feature or service allows companies to track and categorize spending on a detailed level?

A. Cost allocation tags

B. Consolidated billing

C. AWS Budgets

D. AWS Marketplace

Reference: https://aws.amazon.com/blogs/startups/how-to-set-aws-budget-when-paying-with-aws-credits/