Who of the following is most closely associated with an altarpiece completed for the cathedral at Ghent and involving more than a dozen hinged panels?

Which Austrian musician is often considered the "Father of the Symphony"?

A) ?Haydn B) ?Mozart C) ?Beethoven D) ?Bach

Music has been regarded as an important component of political life in China

A. for more than 3000 years. B. since the beginning of the communist era. C. since the beginning of the Cultural Revolution. D. since the late 19th century.