Which statement best describes the NTP stratum model and its responsibility?

Which statement best describes the NTP stratum model and its responsibility?

what is the answer?

$1.$The NTP stratum model is a diagnostic tool that helps troubleshoot time synchronization issues and identify any discrepancies in time accuracy.

$2.$The NTP stratum model is a configuration option that allows users to specify their preferred time source and adjust the synchronization settings.

$3.$The NTP stratum model is a hierarchical system that ranks time servers based on their accuracy and reliability. It ensures that time synchronization is maintained across all devices on the network.

$4.$The NTP stratum model is a security mechanism that prevents unauthorized access to time servers and ensures the integrity of time synchronization.