Read the passage below carefully, and then choose the best answer:
Learning to Dig Jazz Music
It has been said that jazz is America’s greatest contribution to music. It mixes the powerful rhythm of African traditions with elements of European classical music. The beginnings of jazz music are a bit unclear, but many people believe it originated in New Orleans during the late 1800s. New Orleans was a melting pot where local tribes mixed with immigrants who came from Africa and Europe to form a new, unique culture. Jazz has several elements which set it apart from other styles of music. Compared to rock music, jazz is more complex and versatile. Whereas rock bands typically consists of a drummer, some guitarists, and a singer, jazz bands can be big or small and they are made up from a wide variety of instruments. Another thing which sets jazz apart from other forms of music is improvisation. Musicians start with a basic structure, perhaps a few chords, and then they decide what to play in the moment. Therefore, even if the same songs are repeated, you can be certain that no two jazz concerts are the same. Over the years, many sub-genres of jazz came about. Ragtime is one of the first styles that came about, and it consists mainly of upbeat piano compositions. Dixieland Jazz started in the 1920s and it incorporated blue music and brass bands. Next came the Big Band era, which showcased groups with 10 or more musicians playing different instruments. In the Bebop era of the 1940s, jazz musicians returned to smaller groups of four to six musicians, but they started playing far more complex melodies. If you are just becoming interested in jazz, you should start by listening to the works of some of its masters. Louis Armstrong is considered one of the grandfathers of jazz, as he helped to spread jazz to the masses in the 1920s. Armstrong is perhaps best-known today for singing the classic song “What a Wonderful World”, but in his prime, he was a talented bandleader and an incredible trumpet player. Charlie Parker was all the rage during the bebop age, as every saxophone player was trying to imitate him. Miles Davis is another pioneering jazzman who everyone should check out, as he was always changing his style. During his long career, Davis won nine Grammy awards. Although jazz music is an acquired taste, once you begin to appreciate it, it is like a fine wine that gets better with age.
5. The word “they” in paragraph 2 refers to ___________
