How can this be achieved?

PassLeader has three AWS accounts. They have created separate IAM users within each account. PassLeader wants a
single IAM console URL such as https://passleader.signin.aws.amazon.com/console/ for all account users. How can this
be achieved?

A.
Merge all the accounts with consolidated billing

B.
Create the same account alias with each account ID

C.
It is not possible to have the same IAM account login URL for separate AWS accounts

D.
Create the S3 bucket with an alias name and use the redirect rule to forward requests to various accounts

Explanation:
If a user wants the URL of the AWS IAM sign-in page to have a company name instead of the AWS account ID, he can
create an alias for his AWS account ID. The alias should be unique.
http://docs.aws.amazon.com/IAM/latest/UserGuide/AccountAlias.html