The correct choice to complete the text is (Choice B) Swentzell:
"Santa Clara Pueblo artist Roxanne Swentzell’s sculpture Mud Woman Rolls On consists of five human figures made of clay and plant fiber and arranged in descending size; each figure holds the smaller one in front of it. The arrangement of the figures, according to Swentzell: represents her idea that 'we all come from the Earth, generation after generation.'"
Using a colon after "Swentzell" introduces the explanation that follows.