Final answer:
The RDesk addresses billing issues and fraud-related concerns, as stated in the fourth option provided.
Step-by-step explanation:
If you're asking about the issues that are addressed by the RDesk, the fourth option is correct. RDesk typically deals with billing issues and fraud. Troubleshooting billing concerns involves resolving discrepancies in charges, payments, or account statements, which are common tasks in customer support centers such as RDesk.
Additionally, fraud is a critical area that customer service and support desks often handle, as they are responsible for investigating suspicious activities, preventing fraudulent transactions, and protecting customer information.