Final answer:
The Cubists were the group most notable for experimenting with collage.
Step-by-step explanation:
The Cubists were the group most notable for experimenting quite a bit with collage. Cubism, established by Picasso and his colleague Georges Braque, was marked by a revolutionary departure from representational art. In Cubist artwork, objects were analyzed, broken up, and reassembled in an abstracted form instead of being depicted from one viewpoint.