What do you need to ensure when using the key user tools to add an extension field that will be included in the integration between SAP S/4HANA and SAP Sales and Service Cloud?

What do you need to ensure when using the key user tools to add an extension field that will be included in the integration between SAP S/4HANA and SAP Sales and Service Cloud?
A . The new field is added to a data source
B . The new field is added to the service
C . The new field is added to the OData service
D . The new field is added to the extension scenario

Answer: C