Think of it this way :
The company wants to obtain billing discounts that are based on the company’s use of AWS services.
Based on the company’s use of AWS services. NOT based on the number of accounts right...
Consolidated billing = AWS Organizations provides consolidated billing so that you can track the combined costs of all the member accounts in your organization.
so B is a No No
So what's the service it's using? Compute workloads that cannot be interrupted.
Spot Instances = Spot Instance can only be launched when its request is active and capacity is available.
So D is a No No
Resource tagging = Tags can help you manage, identify, organize, search for, and filter resources. You can create tags to categorize resources by purpose, owner,
environment, or other criteria. Each tag has two parts: A tag key (for example, CostCenter , Environment , or Project ). Tag keys are case sensitive.
So A is a No No
C it is then