Part II. TRUE OR FALSE. Direction: Write TRUE if the statement is correct and FALSE IF NOT. 1. Improvisation was a necessity in Avant Garde style, for the musical scores were not necessarily followed as written. 2. The first song was written by George Gershwin in 1916 was his first Broadway musical La La Lucille in 1919. 3. Together with Bartok, Prokofieff made extensive use of polytonality, a kind of atonality that uses two or more tonal centers simultaneously. 4. Philip Glass's big break came when he was asked to substitute for the ailing Bruno Walter in conducting the New York Philharmonic Orchestra in a concert on November 14, 1943. 5. Leonard Bernstein explored the territories of ballet, opera, theater, film, and even television jingles. 6 Music that uses the tape recorder is called musique concrete, or concrete music. 7. Edgard Varese was considered an "innovative French-born composer." 8. Electronic Music refers to a style wherein the piece always sounds different at every performance because of the randon techniques of production, including the use of ring modulators or natural elements that become a part of the music. 9. John Cage challenged the very idea of music by manipulating musical instruments in order to achieve new sounds. 10. Karlheinz Stockhausen is a central figure in the realm of electronic music.​