Explanation:

✅ B. Create a custom report type, Select four object relationships, Select additional objects
To create a service report in Salesforce Service Analytics that includes 50 object references, the most effective approach is to create a custom report type. This allows Universal Containers (UC) to define a primary object and select up to four related objects through object relationships, as well as include additional objects as needed to reach the requirement of 50 object references. Custom report types provide flexibility to configure complex reports that can pull data from multiple objects, ensuring the report aligns with the Sidebar-By Customer dashboard’s structure for customer-focused service reporting. This method is native to Salesforce, scalable, and integrates seamlessly with Service Analytics dashboards.

❌ A. Create 10 service reports, Select the objects, Combine the service reports
While creating multiple service reports and combining them might seem like a workaround, Salesforce does not natively support combining multiple service reports into a single report with 50 object references. This approach would be cumbersome, error-prone, and inefficient, as it requires manual aggregation outside the platform’s standard reporting capabilities. It also risks misalignment with the Sidebar-By Customer dashboard’s requirements, making it an impractical solution.

❌ C. Create a Visualforce service report, Create objects and fields, Inject into the objects and fields in the report
Using a Visualforce service report involves custom development, which is unnecessarily complex for this requirement. Visualforce allows for customized report rendering but is not designed to handle 50 object references efficiently within a standard Service Analytics dashboard like Sidebar-By Customer. Creating and injecting objects and fields via Visualforce would require significant coding effort and maintenance, and it may not fully leverage Service Analytics’ native reporting capabilities, making it less suitable than a custom report type.

Reference:
🔗 Salesforce Custom Report Types
🔗 Visualforce Developer Guide