A user is planning to use AWS services for his web application. If the user is trying to set up his own billing management
system for AWS, how can he configure it?

A.
Set up programmatic billing access. Download and parse the bill as per the requirement

B.
It is not possible for the user to create his own billing management service with AWS

C.
Enable the AWS CloudWatch alarm which will provide APIs to download the alarm data

D.
Use AWS billing APIs to download the usage report of each service from the AWS billing console

Explanation:
AWS provides an option to have programmatic access to billing. Programmatic Billing Access leverages the existing
Amazon Simple Storage Service (Amazon S3) APIs. Thus, the user can build applications that reference his billing data
from a CSV (comma-separated value) file stored in an Amazon S3 bucket. AWS will upload the bill to the bucket every
few hours and the user can download the bill CSV from the bucket, parse itand create a billing system as per the
requirement.