Question: What information does the CHF return to the PCF if no policy counter identifier(s) is provided in the Initial Spending Limit Report Retrieval?
Option 1: The status of only relevant policy counters for a policy decision.
Option 2: The policy counter status of all policy counter(s) available for this subscriber, including pending policy counter statuses and their activation times.
Option 3: An error message indicating that the list of policy counter identifier(s) is required.
Option 4: A notification that no policy counters are available for this subscriber.
Explanation: According to the text, if the PCF does not provide the list of policy counter identifier(s), the CHF returns the policy counter status of all policy counter(s), which are available for this subscriber. This includes pending policy counter statuses and their activation times.