You have set up Individual AWS accounts for each project. You have been asked to make sure your AWS Infrastructure costs do not exceed the budget set per project for each month.
Which of the following approaches can help ensure that you do not exceed the budget each month?

A. Consolidate your accounts so you have a single bill for all accounts and projects
B. Set up auto scaling with CloudWatch alarms using SNS to notify you when you are running too many Instances in a given account
C. Set up CloudWatch billing alerts for all AWS resources used by each project, with a notification occurring when the amount for each resource tagged to a particular project matches the budget allocated to the project.
D. Set up CloudWatch billing alerts for all AWS resources used by each account, with email notifications when it hits 50%. 80% and 90% of its budgeted monthly spend