Question: Upon expiration of timer T3 or timer T1 with queued floor requests, what action does the IWF floor control server take regarding the Floor Taken message to the associated floor participant?
Option 1: Suppress sending the Floor Taken message until all timers expire without queued requests.
Option 2: Send a Floor Release message instead to clear existing floor grants.
Option 3: Shall send the Floor Taken message and may set the acknowledgment required bit in its subtype.
Option 4: Ignore the timer expirations if there are no active voice transmissions.
Explanation: This is correct because, upon receiving a trigger from expired timers with queued requests, the IWF floor control server must send the Floor Taken message to the participant and may require acknowledgment by setting the corresponding subtype bit, ensuring efficient MCPTT floor control management.