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A
Paying sales tax
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B
Serving on a jury (and voting in a federal election)
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C
Driving a car
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D
Attending school
Why this is the answer
Responsibilities ONLY for U.S. citizens include: SERVING ON A JURY; and VOTING in a federal election. USCIS 65/20 Civics Question: 'What is one responsibility that is only for United States citizens?' — Accepted answers: serve on a jury; vote in a federal election. These are reserved for citizens. Note: many obligations (obeying laws, paying taxes) apply to everyone, but jury service and voting in federal elections are citizen-specific responsibilities; this pairs with the citizen-only RIGHTS (vote in federal elections, run for federal office).
Source: USCIS Civics 65/20 — Citizen-Only Responsibilities