Final answer:
Citizens in the United States can vote using secret or absentee ballots, allowing them to vote in private or by mail if they cannot be present at the polls. Mechanical voting machines are not the only option for voters.
Step-by-step explanation:
In the United States, citizens can vote using secret or absentee ballots. They have the option to cast their votes in private, without anyone observing, or they can choose to vote by mail if they are unable to be present at the polls on Election Day. Mechanical voting machines are not the only option for voters; they can also use paper ballots or electronic voting machines.
Learn more about Voting in the United States