Final answer:
After World War II, increased racial and cultural integration influenced the rise of diverse music styles, especially as economic prosperity and technology spread music wider. Youth embraced rock 'n' roll, which crossed racial lines and signified a break from the preceding era's conformity. The correct answer is B) Increased racial and cultural integration influenced music styles.
Step-by-step explanation:
In the years after World War II, increased racial and cultural integration indeed influenced music styles, contributing to the diversity in popular music. The economic prosperity of the post-war era led to technological advancements such as radio and records, which allowed music to reach a wider audience.
Moreover, the youth of the 1950s, who were searching for their own identity, found excitement and a sense of rebellion in rock 'n' roll. This was music originally rooted in African American communities that increasingly crossed over to mainstream popularity.
Artists, both white and black, were pushing the boundaries of music, with rock 'n' roll symbolizing a departure from adult conformity.
Thus, the correct answer is that B) Increased racial and cultural integration influenced music styles.
This period was not marked by economic depression in music production, strict censorship laws (though there were controversies), or the decline of traditional folk music, but rather an explosion of new music forms that were fueled by post-war affluence and the evolution of cultural norms.