Question: What is the primary requirement for the 5G system regarding user privacy during ranging?
Option 1: To allow identifiable information to be tracked by undesired entities.
Option 2: To ensure that no identifiable information can be tracked by undesired entities, but only in licensed spectrum.
Option 3: To ensure that no identifiable information can be tracked by undesired entities during ranging, regardless of the type of spectrum used.
Option 4: To provide an option for users to opt-out of privacy protection during ranging.
Explanation: The correct answer is Option 3 because the 5G system shall ensure that no identifiable information can be tracked by undesired entities during ranging, which is a fundamental requirement for protecting user privacy. This requirement applies regardless of whether licensed or unlicensed spectrum is used.