People should find more effective ways to deal with nuclear wastes leaked by the plant accidents like that in Fukushima (福岛).

The Chernobyl steam explosion is considered the worst nuclear power plant accident in history, and is one of only two classified as a level ___ event on the International Nuclear Event Scale (the other being the Fukushima Daiichi nuclear disaster).

In the Fukushima nuclear accident, what was the main reason for the power outage of the whole plant () A: Not enough emergency generators B: Off-site electricity support is not timely enough C: The distribution system is flooded D: The tornado cut the wires