Who defended the Pons Sublicius against the Etruscans?

The correct answer is Horatius Cocles. In the historical narrative, Horatius Cocles is renowned for his bravery and valor during a critical moment in Roman history, specifically when he defended the Pons Sublicius, one of Rome's earliest wooden bridges. The story recounts how Cocles heroically stood alone against the invading Etruscan forces, buying time for his fellow Romans to retreat and secure the city. He famously defended the bridge, demonstrating exceptional courage and resolve, ultimately jumping into the Tiber River to escape and swim back to safety after he successfully held off the attackers. This act of heroism symbolizes the spirit of defiance and patriotism central to Rome's founding legends.

While other figures mentioned in the options are significant in Roman history, their contributions are not directly linked to the defense of the Pons Sublicius against the Etruscans, thereby underscoring why Horatius Cocles is the most appropriate choice in this context.