車が二___歒まっています。 (Two cars are parked.)

Answer and explanation

Correct answer: B. 台

Vehicles and machines are counted with 台.
Answer: 台.
Why not the others: 本: 本 counts long thin objects. 匹: 匹 counts small animals. 枚: 枚 counts flat objects.

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車が二 歒まっています。 (Two cars… | JLPT Practice (N5 and N4) - Japan