Which of the following refers to the responsibilities of a citizen, such as serving on a jury or being a witness in court?

The correct choice is civic obligations. This term encompasses the responsibilities and duties that individuals have as members of a society, particularly in relation to participation in the legal system and governance. Serving on a jury and being a witness in court are direct examples of civic obligations, as they require citizens to contribute to the justice system and maintain the rule of law.

Community service refers to voluntary work intended to help people in a particular area, which, while important, does not specifically encompass the legal or governance-related duties that civic obligations do. Civil rights, on the other hand, focus on the rights guaranteed to individuals to ensure their freedom and equality, rather than the responsibilities they hold. Public duties can be similar to civic obligations but tend to refer more broadly to responsibilities associated with specific roles in public office, rather than the general duties of citizenship. Thus, civic obligations most accurately captures the essence of the responsibilities needed in the context provided.