Universal Containers (UC) has implemented SSO according to the diagram below.

  These are the systems that are acting as identity providers (IdPs) in the SSO scenario. An IdP is a trusted provider that enables a customer to use single sign-on (SSO) to access other websites5. In this case, Pingfederate and Salesforce Org 1 are the IdPs that authenticate the users and issue SAML assertions or OAuth tokensto the service providers (SPs). The SPs are the websites that hostapps and rely on the IdPs for authentication5. In this case, Salesforce Org 2, Financial System, and CPQ Systemare the SPs that receive the SAML assertions or OAuth tokens from the IdPs and grant access to the users.

Option A is incorrect because Financial System is not an IdP, but an SP. It does not authenticate the users, but receives SAML assertions from Pingfederate. Option C is incorrect because Salesforce Org 2 is not an IdP, but an SP. It does not authenticate the users, but receives OAuth tokens from Salesforce Org 1.