Question: In a 5G system, what is a key aspect of subscription policies for services without QoS (Quality of Service) criteria, as per operator policy?
Option 1: Dynamic adjustment of data speeds based on network congestion
Option 2: Association of financial charging information with data usage only
Option 3: Definition and enforcement of a maximum energy consumption limit for a specified period
Option 4: Automatic service upgrade to ensure minimum QoS criteria are met
Explanation: This answer highlights the system's capability to define and enforce a maximum energy consumption limit for services without QoS criteria, subject to operator policy, crucial for managing energy credits and controlling consumption based on predefined limits.