C. computer modeling systems for hurricanes
Computer modeling systems for hurricanes generally provide the greatest warning time before the hazard occurs. These models can forecast a hurricane's path and intensity days in advance, while the other options (Doppler radar for tornadoes, seismographs for earthquakes, and water level/rainfall simulators for floods) typically offer less warning time. Tornadoes can develop very quickly, earthquakes give little to no warning, and flood warnings depend on real-time data which may not provide as much advance notice as hurricane models.