Wolfgang Amadeus Mozart called the form of his last four great operas

Which of the following were characteristics of Louis Armstrong's vocal style?

a. Melodic invention b. Rhythmic elasticity c. Scat Singing d. All of the above

Which of the following best describes this composition's musical style?

a) it features relatively dense textures and lots of chromaticism b) it features relatively dense textures with almost no chromaticism c) it features predominantly chordal textures with occasional antiphonal exchange d) it features both dense and light textures with frequent voice exchange