Rebecca has just learned to say “Mama.” According to Piaget’s stages of cognitive development, in which stage would Rebecca be categorized?

Which of the following best describes the bass line of this selection?

a) it recalls the double bass in vaudeville shows b) it recalls the tuba in a Sousa march c) it recalls banjo music from minstrel shows d) it recalls the double bass in a Strauss waltz

Sound recordings were not taken seriously in the late teens and early 1920s because their primary

function was to

a. promote a band's live performance b. appeal to younger audiences c. serve as a historical document d. hook consumers into buying products by getting them to listen to the record