QUIC (HTTP/3) runs over UDP. How does it handle packet loss reliability if UDP is unreliable?

1. A It implements complex retransmission, congestion control, and flow control mechanisms within the user-space application layer, rather than relying on the kernel's native TCP stack.
2. B It utilizes specialized, low-level LTE and 5G hardware features that provide native link-layer reliability for unreliable datagrams without requiring high-level software acknowledgement.
3. C It fundamentally prioritizes speed over data integrity, intentionally forgoing any reliability guarantees to ensure the lowest possible latency for real-time video streaming services.
4. D It relies exclusively on Reed-Solomon forward error correction (FEC) to mathematically reconstruct lost data packets without requiring any back-and-forth chatter between the host and peer.