What Major Event Happened at Chernobyl,Ukraine,in 1986

Multiple Choice

What major event happened at Chernobyl,Ukraine,in 1986?

A) the explosion of a nuclear reactor
B) arms-reduction talks between Mikhail Gorbachev and Ronald Reagan
C) the declaration of an independent Ukraine
D) the first public broadcast of American television in the Soviet Union
E) the signing of a treaty officially ending the Second World War