Which of the following is least accurate?

A. Rock-n-roll drew upon both white and black musical styles.
B. Abstract expressionism, as seen in work by such painters as Jackson Pollock, became one of America's more important postwar artistic movements.
C. Thinkers such as W.E.B. DuBois, Zora Neale Hurston, and Langston Hughes pushed boundaries by examining the Chicano experience.
D. "Multiculturalism" became an important value for many Americans in the last quarter of the twentieth century.