Answer: D. Gladiatorial games occurred from the custom to kill people (prisoners of war or slaves) over the tomb of a fallen leader, was in antiquity distributed everywhere.
Gladiators were recruited from among prisoners of war, convicted criminals, slaves, as well as free citizens-fans of thrills, who went to the arena by vocation, not coercion. In the period of greatest prosperity of gladiatorial fights in the Roman Empire, there were hundreds of thousand gladiators. Training of gladiators was carried out in special schools with the extremely severe regime and cruel punishments.The main type of combat was paired. In addition, there were so-called bestiaries-fighters who fought exclusively with animals, lions, bears, panthers, bulls, etc.