1. SAP S/4HANA System Customizing (IMG): The configuration to restrict reasons for rejection is performed via the following path: SPRO -> Sales and Distribution -> Sales -> Sales Documents -> Sales Document Item -> Define Reasons For Rejection. This activity includes the step to assign the defined reasons to sales document types
which directly validates answer A.
2. SAP S/4HANA Product Assistance: In the section for Sales Document Processing
the configuration for "Reasons for Rejection" is detailed. It specifies that after defining the reasons
they must be assigned to the relevant sales document types to be available for use within those documents. (Path: SAP Help Portal -> S/4HANA -> Sales -> Basic Functions and Master Data in SD Processing -> Availability of Functions in Sales Documents -> Reasons for Rejection).
3. SAP Learning Hub - Course TS462 (SAP S/4HANA Sales): The unit on "Controlling Sales Documents" explains that many controls
including the availability of specific functions like rejection reasons
are determined by the settings within the sales document type configuration.