What is a quadriga?
Correct answer: A Roman four horse chariot

RedSeaDiver
They were used in the film Ben Hur during the famous race.

Paulus of Tarsus
Quadrigas were a common sight in ancient Roman chariot races and triumphal processions. These races were incredibly popular, and the quadriga became a symbol of victory and triumph, often depicted in art and mythology, including the chariot of the sun god Helios (or Apollo). They were the stars at the Circus Maximus in Rome and other circuses throughout the empire.

Player #97184361
Kiwozzie, Is it that easy a calculation. ? ! ! !

Kiwozzie
quad = 4 so picked the one with four in the answer.

Player #21035860
RedSeaDiver, I think they were also used in the film The Gladiator