The correct options are
A It occurred due to the explosion of a nuclear reactor in 1986.
B The nuclear reactor exploded due to flawed design and negligence.
D The long-term effects of the disaster include cancer, disfigurement at birth, and blindness.
The Chernobyl disaster, counted among the worst industrial tragedies of the world, occurred in 1986 in Ukraine. It was the result of the explosion of a nuclear reactor. The explosion is attributed to flawed reactor design, as well as the negligence of management. The disaster impacted not just Ukraine, but surrounding countries of Belarus and Russia. Even other European countries like Finland and Sweden experienced high levels of contamination.