Final answer:
Spartan society influenced civic responsibility by encouraging active participation in governance and the legal system, specifically by making jury duty possible. Spartans devoted their time to military and governmental service, facilitated by the work helots did for them, allowing more focus on state duties.
Step-by-step explanation:
Spartan society had a significant influence on civic responsibility. When a Spartiate man reached the age of thirty, he was entrusted with multiple civic duties, including the right to vote in the Assembly, the ability to marry, and the capacity to serve as a judge. This demonstrates that Spartan society influenced civic responsibility by encouraging active participation in the governance and legal system, rather than discouraging it, and hence the correct answer to the question is By making jury duty possible (c).
The extensive military training and life-long commitment of Spartans to the service of the state also meant that they did not need to work the land or learn a trade to provide for themselves or their families. This was the job of the helot subjects and commoners, allowing Spartiates to focus more fully on their responsibilities to the state. Throughout history, we've seen that a strong sense of duty and loyalty to the state can encourage citizens to participate in civic duties such as jury service, political deliberation, and military service, all of which were integral to the Spartan way of life.