Question: What does the EPSService class primarily represent in the context of Subscription Management (SuM) Network Resource Model (NRM)?
Option 1: A network resource allocated for an EPS bearer
Option 2: A subscription to an Evolved Packet System (EPS) service for a subscriber
Option 3: A set of all available EPS services offered by the Service Provider
Option 4: The entire network infrastructure supporting EPS services
Explanation: This is correct because, according to the provided context, the EPSService class represents a subscription to an Evolved Packet System (EPS) service for a subscriber, encompassing the agreed-upon parameter settings between the subscriber and the Service Provider. This directly relates to managing individual subscriptions within the broader Subscription Management (SuM) framework.