1. SAP Help Portal
SAP Business Technology Platform
Assigning Role Collections: This document explicitly details the two primary methods for assignment.
For option D (BTP Cockpit): "You can assign role collections to users or user groups in the SAP BTP cockpit." (Section: Assign Users or User Groups to a Role Collection in the Cockpit)
For option E (IdP Mapping): "We recommend that you manage users and their authorizations by mapping role collections to user groups on the level of the identity provider." (Section: Map Role Collections to User Groups in Your Identity Provider)
2. SAP Help Portal
SAP Build Work Zone
advanced edition
User and Group Management with the SCIM API: This document confirms the use of the service-specific SCIM API for managing groups that are mapped to role collections.
For option B (SCIM API): "The SCIM V2.0 API allows you to manage users and groups in the Identity Directory... You can map these groups to role collections in your subaccount on the SAP BTP." (Introduction section)
3. SAP Help Portal
SAP Build Work Zone
advanced edition
About Roles and Authorizations: This document clarifies the distinction between platform-level role collections and roles managed within the Content Manager.
For option A (Content Manager): It describes how administrators use the Content Manager to "assign roles to the content that you create" to control visibility
which is distinct from assigning platform-level role collections to users. (Section: Roles)