Which of the following three actors could form an "iron triangle"? a. Bayer AG, Eli Lilly & Company, and Pfizer Inc. (all pharmaceutical companies) b. the Food and Drug Administration, the Department of Health and Human Services, and the president c. the House Energy and Commerce Committee, the Senate Committee on Health, Education, Labor and Pensions, and the Department of Health and Human Services d. the Food and Drug Administration, Pfizer Inc., and the Senate Committee on Health, Education, Labor and Pensions