What best-selling Miles Davis album featured a decisive shift toward modal jazz?

Music is

A. sound you want to hear as music. B. sound that is pleasing to the ear. C. sound and silence organized in time. D. all of these.

What design innovation does the smartphone have in common with the transistor radio?

a)  They are both handheld devices. b)  They both have digital technology. c)  They both run on electricity. d)  They both use apps.