Final answer:
The sentence that best supports Graham's reputation as an innovator is the one indicating she was the first choreographer to fully collaborate with other modern artists, as it underlines her interdisciplinary and pioneering approach within the arts.
Step-by-step explanation:
To best support the idea that Graham was an innovator, the sentence that could be added is: B Graham was the first choreographer to fully collaborate with other modern artists. This statement highlights Graham's pioneering role in collaborating closely with artists from other disciplines, indicating an innovative and interdisciplinary approach to dance and choreography. Such collaboration can be seen as a significant contribution to the development of modern dance, paralleling the innovative work of contemporaries like Gorky, de Kooning, and Pollock in visual arts, and the conceptual exploration of dance by Morris and the experimental Judson Dance School.