Which of the following can be inferred from the passage about the "tension"? A. It partly resulted from social injustices that Ellison worked to alleviate. B. It came to Ellison's attention partly as a result of his experience with proposed film versions of Invisible Man. C. Ellison thought that it could not be adequately represented by sculpture. D. Ellison believed that it arose from contradictions within the United States' founding ideals. E. Ellison felt that it was an issue that could not adequately be addressed through the depiction of fictional characters.