An application needs Redis to survive a full server restart without data loss. Which persistence option persists all write operations to disk in real time?

1. A RDB (snapshot)
2. ✓ B AOF (Append-Only File) (correct answer)
3. C No persistence
4. D Replication only

Shortcut: AOF persistence logs every write operation to disk. On restart, Redis replays the AOF file to reconstruct the dataset. It provides better durability than RDB but uses more disk I/O.