However , George Butler and Charles Gaines convinced him to compete one more time so they could make the bodybuilding documentary called Pumping Iron . Schwarzenegger had only three months to prepare for the competition after losing significant weight to appear in the film Stay Hungry with Jeff Bridges . Ferrigno proved not to be a threat , and a lighter than usual Schwarzenegger convincingly won the 1975 Olympia . After being declared Mr. Olympia for a sixth consecutive time Schwarzenegger once again retired from competition . Schwarzenegger came out of retirement once more to compete in the 1980 Mr. Olympia .

Question: what may have happened if Ferrigno had been a fierce threat than he was ?
Answer: Schwarzenegger 's final retirement would have still been after the 1980 OlympiaSchwarzenegger would certainly have won the 1975 OlympiaSchwarzenegger might not have won the 1975 OlympiaNone of the above choices .