Why (B)?
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All cities and most towns have antismoking ordinances (Not every place in the state)
Petition for Statewide Smoking (every place in the state)= Do you want to sign a petition for statewide smoking restriction? (Yes or No)
Condition (1) If some voters think in the rural there are few retail establishments and government offices , they will say “No”.
Condition (2) If other voters think in the rural there are still some retail establishments and government offices out of the antismoking ban, they will say “Yes”.
Why not (C)?
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The Focus is on the question: Do you want to sign a petition for statewide smoking restriction? Whether the state law outweighs the local ordinance is not the point. The effectiveness of the law is not mentioned in the question.