Rewrite the sentence to eliminate ambiguous, remote, or broad reference. If a person has income tax questions, the IRS can help you with it.

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every person should make it a priority to serve at least two hours per week.

it's an extremely important civic responsibility that is invaluable to citizens most in need is the correct one

homework should not be banned because it tells the teacher if you were paying attention in class or not. it assures the teacher that you understand the material so you can move on to different material.