Skill is one of the most popular sports in the world. According to recent estimates, about one hundred million people ski regularly or occasionally. Sliding across the snow on skis is also one of the most ancient methods of transport known to man. It has been demonstrated that men were already traveling across the snow by means of primitive skis before the invention of the wheel. In the Asiatic region of Altai and in Scandinavia, for example, the remains of skis have been found which date back to 4,000 BC. Further evidence is supplied by ancient cave paintings, which depict people skiing, and a Norwegian saga which tells the story of an invasion of its territory 8,000 years ago by tribe of skiers who came from the north. Nowadays, skiing, apart from being a sport, has become a big industry and a notable feature of leisure culture. Ski resorts and all the activity that they generate are the main source of wealth in many mountain regions, which were previously remote and inaccessible. Far from its once elitist image, skiing is now enjoyed by an increasingly broader spectrum of society.
“Skiing, apart from being a sport, has become a big industry and a notable feature of leisure culture
A . unworthy
B. principal
C. interesting
D. minor