Question: Which of the following best describes the primary responsibility of the Location System Billing Function (LSBF) in a telecom network?
Option 1: Managing subscriber location privacy settings across different Public Land Mobile Networks (PLMNs)
Option 2: Optimizing cell tower placement for improved location service accuracy
Option 3: Handling charging, billing, and accounting for Location Services (LCS) between clients, subscribers, and PLMNs
Option 4: Conducting regular audits on LCS usage for security breaches
Explanation: The correct answer is Option 3 because the LSBF's primary role, as indicated by its responsibilities, involves managing financial aspects related to Location Services. This includes charging clients and subscribers who use these services and facilitating accounting processes between different Public Land Mobile Networks (PLMNs) when location services are utilized across network boundaries. This ensures that all parties involved in providing or using LCS are properly billed or reimbursed.