39. Jeans are the most popular kind of casual wear. They are worn by both the old and the young. Why are they so popular? In the United States, they are the only kind of traditional clothes. Elsewhere, young people wear them to keep up with fashion. _________. Many people wear jeans because they want to look modern, young, and independent. (A) Jeans are good strong clothes (B) Jeans were always blue until recently (C) Rich people and poor people wear them (D) Jeans are a sign of youth and independence