Question: In an Isolated Operation for Public Safety (IOPS) mode, what type(s) of bearer establishment and modification does the IOPS Mission Critical (MC) system support for MC services?
Option 1: Unicast bearer establishment and modification only
Option 2: Multicast bearer establishment and modification only
Option 3: Both unicast and multicast bearer establishment and modification
Option 4: Neither unicast nor multicast bearer establishment and modification
Explanation: The IOPS MC system supports both unicast (for dedicated communications) and multicast (for group communications) bearer establishment and modification to efficiently manage various MC service requirements in IOPS mode, enhancing flexibility and responsiveness in critical scenarios.