An organization has added 3 of his AWS accounts to consolidated billing. One of the AWS accounts has purchased a
Reserved Instance (RI) of a small instance size in the US-East-1a zone. All other AWS accounts are running instances
of a small size in the same zone. What will happen in this case for the RI pricing?

A.
Only the account that has purchased the RI will get the advantage of RI pricing

B.
One instance of a small size and running in the US-East-1a zone of each AWS account will get the benefit of RI pricing

C.
Any single instance from all the three accounts can get the benefit of AWS RI pricing if they are running in the same zone and are of
the same size

D.
If there are more than one instances of a small size running across multiple accounts in the same zone no one will get the benefit of
RI

Explanation:
AWS consolidated billing enables the organization to consolidate payments for multiple Amazon Web Services (AWS)
accounts within a single organization by making a single paying account. For billing purposes, consolidated billing treats
all the accounts on the consolidated bill as one account. This means that all accounts on a consolidated bill can receive
the hourly cost benefit of the Amazon EC2 Reserved Instances purchased by any other account. In this case only one
Reserved Instance has been purchased by one account. Thus, only a single instance from any of the accounts will get
the advantage of RI. AWS will implement the blended rate for each instance if more than one instance is running
concurrently.