During the 1988 Seoul Olympiad

During the 1988 Seoul Olympiad

A) there was a fear that the hostilities that exist between South Korea and North Korea would surface during the Olympics.
B) there was a concern about how Japanese fans would be treated in Korea since Japan and Korea have a history of confrontation that is over a thousand years old.
C) South Korea charged that NBC purposely set out to humiliate and embarrass South Korea because the NBC cameras kept replaying a fight where South Korean fans attacked the referee who declared that a South Korean athlete had lost a boxing match.
D) Canadian sprinter Ben Johnson who won the gold medal in the 100 meter was found to have used steroids and stripped of his gold medal.
E) All of the above.