Final answer:
Responsibilities of a U.S. citizen include paying taxes, participating in jury duty, and obeying laws. Mandatory military service is not required unless there's a draft, but men must register for selective service. Other duties like volunteering and being informed are considered moral responsibilities.
Step-by-step explanation:
Among the options provided, the responsibilities one should fulfill as a citizen of the United States are pay taxes, participate on a jury if needed, and respect and obey federal, state, and local laws. None of the choices presented perfectly match the clear responsibilities expected of U.S. citizens; however, option A contains elements that are closest to the actual responsibilities, minus the mandatory military service, which is not required unless there is a military draft. However, all males are required to register for selective service at 18 years old, which could be confused with mandatory service. It's important to distinguish between these and other aspects, such as voluntary community service or the prevention of disrespect towards the government, which are not legally required duties.
Citizens also have moral duties such as staying informed of issues affecting their community, participating in the democratic process, and respecting the rights and opinions of others. While jury duty and paying taxes are legal requirements, other responsibilities such as volunteering in the community are more aligned with moral duties or good citizenship practices.