Question: Upon receiving a Floor Granted message from the floor control arbitration logic, what action may the IWF floor control server take regarding the subtype of the Floor Granted message sent to the MCPTT client?
Option 1: Always set the first bit in the subtype to '0' (Acknowledgment is not required)
Option 2: May set the first bit in the subtype to '1' (Acknowledgment is required)
Option 3: Shall never modify the subtype of the Floor Granted message
Option 4: Must discard the Floor Granted message if no Acknowledgment is expected
Explanation: This action is permissible, allowing flexibility in handling acknowledgment requirements based on implementation choices. Setting the first bit to '1' indicates that an acknowledgment (Floor Ack message) is expected from the recipient, influencing how the IWF manages subsequent communications or state transitions if the acknowledgment is not received.