What drugs did teens at raves favor?

What was a factor that allowed independents to compete with major record labels in the late 40s and early 50s?

a. Invention of the 45rpm b. Rise of radio station chains c. Introduction of Top Forty d. Strict segregation of genres

Elements such as traditions, dominant styles, or popular forms that are common to several different types of art are called

A. genres. B. formulas. C. traits. D. conventions.