D. Combine the usage across all accounts to share the volume pricing discounts
Answer: D
Explanation
Available feature sets in AWS Organizations:
All features – The default feature set that is available to AWS Organizations. It includes all the functionality of consolidated billing, plus advanced features that give you more control over accounts in your organization.
Consolidated billing – This feature set provides shared billing functionality but does not include the more advanced features of AWS Organizations.
Option A is incorrect: Because SCP is part of the advanced features which belong to “All features”.
Option B is incorrect: Because tag policies can be applied under the feature set of “All features”.
Option C is incorrect: This is implemented using SCP which is not supported in “Consolidated billing”.
Option D is CORRECT: ‘Consolidated billing’ feature set provides shared billing functionality.