A、By the jackets he wears. B、By the gestures he poses. C、By the trousers and shoes. D、By the color of the waist belt. D

In 1880, Professor Jigoro Kano of Japan began a new sport. He called it judo. The sport, judo, comes from an old Japanese way of fighting called jujitsu. Jujitsu was a way of killing your enemies; judo is a sport. At the beginning of the twentieth century, some Japanese came to Western Europe and did judo in the theaters. Today, judo is a popular sport in a lot of countries.
    Some people learn judo because it is a way of defending themselves.  They can then defend themselves if someone attacks them. People who are good at judo know a lot about the body. They are always polite and never get violent when they play.
    In judo, the two contestants wear jackets, trousers, and belts. The color of the belt is important. It shows how good the person is at judo. The best judo contestants wear black belts.