Which activity is an obligation for U. S. citizens? report for jury duty
enlist in the military
vote in national elections
volunteer in the community

report for jury duty

Explanation:

jury duty requires you by law to show up unless you have a good reason not to.

the other options do not require you to do by law.

america opposed the axis powers, because they knew that the united states would be targeted during the war. not only that, but germany (which was an axis power) broke the treaty of versailles, and started developing an army, and started attacking and taking over countries. furthermore, japan, which was allied with germany and italy (who both were axis powers) was attacking china, which was a great ally to the united states.

with my knoladg i would say it was c