Why Did Many Middle-Class Parents Object to Rock-And-Roll

Why did many middle-class parents object to rock-and-roll?

A) They linked rock-and-roll with sex and violence.
B) Many rock-and-roll singers such as Elvis Presley were avowed communist sympathizers.
C) They feared that the African-American rhythm-and-blues inspiration for rock-and-roll would lead to integration and intermarriage.
D) Rock-and-roll was linked with a widespread drug culture.
E) all of these choices