The Iron Triangle that the Crash Course video discusses as an obstacle to making substantial changes to the U.S. healthcare system is which of the following? 1. The mutually beneficial relationship between Congress, government bureaucrats, and lobbyists. 2. The mutually beneficial relationship between the pharmaceutical industry, the insurance industry, and the FDA. 3. The mutually beneficial relationship between hospitals, insurance companies, and patients. 4. The conflicting interests of hospitals, insurance companies, and patients