In the world, football is the most popular sport. This is because many countries have strong teams for the World Cup. The World Cup is held every four years. To remember 2002 FIFA World Cup, children from different countries spent three weekends together, drawing a big picture called "Dream World Cups" in Japan. They drew many things on it. Some even drew people playing football under a blue bright sky. They drew the flags of all the countries that would take part in the World Cup in Japan and South Korea (韩国) wishing each football team good luck. The picture was put up in a park near a playground in Yokohama (横滨). Some football teams would have games there. Are you interested in football The World Cup makes more and more people interested in football. It makes young people like playing and watching football. Many of them are crazy about famous football stars. They buy the pictures of their favorite players and put them on the walls of their own rooms. That is the way to show their love for the World Cup. How often is the World Cup held

A. Every four years.
B. Every five years.
C. Every three years.