Refer to the exhibit.

A customer has SSO on its AEM Author environment using Adobe IMS, which is integrated with the customer's IDP using SAML The customer plans to roll out a new secured website on AEM where SSO authentication is required for end users. The end user accounts are also managed in the customer's existing IDP.
How should the Architect set up the authentication for the website?
- Integrate AEM Publisher using SAML with Adobe IMS
- Set up CUG and use User Synchronisation from Author to Publisher
- Integrate AEM Publisher using SAML directly with the IDP
- Integrate AEM Publisher using oAuth with Adobe IMS
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