Answer:
a stable representative government
Answer:
the use of poison gas and machine guns
Explanation:
Aerial attacks weren't really a thing, unrestricted submarine warfare was a reason why the US joined the war but not a factor in high casualty rates, and blimps using direct artillery fire isnt as practical as machine guns and poison gas
Answer:
B. Was the largest arena ever created for entertainment.
Explanation:
The Colosseum was commissioned by emperor Vespasian around 70-72 AD, it was intended to be a gift for the people of Rome. Vespasian´s son, emperor Titus, inaugurated it with 100 days of games and spectacles. These included gladiator duels and wild beast fights. It was used for four centuries, after that it was neglected. The Colosseum is a symbol of Rome and its tempestuous history.
