Final answer:
Pete Seeger, Woody Guthrie, and the Almanac Singers embraced political activism and social commentary in their music. Option D is correct.
Step-by-step explanation:
Pete Seeger, Woody Guthrie, and the Almanac Singers were part of the new generation of folk singers in 1941. What made their approach to music significantly different from their predecessors was that they embraced political activism and social commentary.
They used their music to express their political views and shed light on social issues of the time, such as the Vietnam War and civil rights movement.