Read this: Adult contemporary music (AC) is a style of music, ranging from 1960s vocal and 1970s soft rock music to predominantly ballad-heavy music of the present day, with varying degrees of easy listening, pop, soul, rhythm and blues, quiet storm, and rock influence. Adult contemporary is rather a continuation of the easy listening and soft rock style that became popular in the 1960s and 1970s with some adjustments that reflect the evolution of pop/rock music.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): Along with easy listening, adult contemporary is a modern day continuation of what style of music?
soft rock