Which of the following NR system indicators is at the base station level?

According to the HCIA-5G V2.0 Exam Outline, user capacity usage is an NR system indicator that is at the base station level, which corresponds to option C. It reflects the number of users that can be served by a base station. PRB usage, PDCCH resource usage, and paging resource usage are NR system indicators that are at the cell level, which correspond to options A, B, and D. They reflect the utilization of physical resources in a cell.