Explanation :
The correct answer is SCIM. According to CSA guidance 4.0 (page 133), System for Cross-domain Identity Management (SCIM) is a standard for provisioning and deprovisioning accounts in external systems and for exchanging attribute information. SAML also allows for secure exchange of attribute information, but the best answer is SCIM as question literally takes from the guidance word-for-word. WAP is a wireless protocol and oAuth is limited to authorization. Service Provisioning Markup Language is no longer referenced in the 4.0 version of the guidance