Final answer:
Amphitheaters were actually common throughout Italy and the Roman Empire, including the Eastern sector. Some gladiators were indeed free men who volunteered for a limited time of service.
Step-by-step explanation:
The statement that is not true about gladiators and the games is D) Amphitheaters were not found in the Eastern sector of the empire for religious reasons.
Amphitheaters were actually common throughout Italy and the Roman Empire, including the Eastern sector. They were built to host gladiatorial matches and other public entertainments. The Colosseum in Rome is a prime example of an amphitheater where gladiator matches took place.
Some gladiators were indeed free men who volunteered for a limited time of service, which contradicts statement E.