The correct answer is disaster.
The correct answer is (C) A disaster; a sudden tragedy; a violent upheaval, such as an earthquake or extensive flood; a political or social catastrophe.
Cataclysm comes from French cataclysme, Greek Kataklysmos (flood).
Examples of use:
- The recent cataclysm left hundreds dead and thousands missing.
- More than a billion dollars of damage was caused by the cataclysm.