Which of the following TCP flags shows that the system is forwarding the buffered data?

The URG flag marks data as urgent and signals the receiver to process it before other buffered data using the urgent pointer field, but it does not relate to forwarding buffered data to the application.

The RST flag is used to abruptly reset and terminate a TCP connection when an error or unexpected state is detected, not to forward buffered data.

The PSH flag instructs the TCP stack to push all currently buffered data up to the application layer immediately without waiting for the buffer to reach capacity, which is used when real-time or low-latency delivery of data segments is required.

The FIN flag signals that the sender has no more data to transmit and initiates a graceful connection teardown, not the forwarding of buffered data.