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AWS IAM Identity Center (formerly AWS SSO) primarily lets you:

AProvide a free CDN tier for static websites
BCentrally manage workforce access to multiple AWS accounts and third-party SaaS applications using a single identity
CReplace AWS KMS for key encryption operations
DAuto-scale EC2 capacity based on user logins per second
Answer & Solution
Correct answer: B. Centrally manage workforce access to multiple AWS accounts and third-party SaaS applications using a single identity
IAM Identity Center is the centralized federation hub — it lets workforce users sign in once with corporate identity (Active Directory, Okta, Entra ID) and get permission sets across many AWS accounts in an Organization, plus SAML-federated SaaS apps. It does not replace KMS, autoscale anything, or run a CDN.
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