Question: In a 5G network, what is the minimum granularity at which energy consumption monitoring is required to be supported, subject to operator's policy?
Option 1: Per network slice and per subscriber
Option 2: Only per network slice (not per subscriber)
Option 3: Only per subscriber (not per network slice)
Option 4: Per cell or per base station
Explanation: This is because the requirement explicitly states that the 5G network shall support energy consumption monitoring at both "per network slice" and "per subscriber" granularity, allowing for detailed tracking of energy usage across different slices and individual subscribers, subject to the operator's policy. This dual granularity enables more precise management and billing, especially in scenarios where multiple services share the same network slice or when serving third-party agreements.