Final answer:
The best Spanish translation of "She goes to the post office by car" is "Ella va a la oficina de correos en carro." This sentence expresses that she goes to the post office using a car.
Step-by-step explanation:
The best Spanish translation of "She goes to the post office by car" is "Ella va a la oficina de correos en carro." This sentence expresses that she goes to the post office using a car. The verb "va" (goes) indicates her action, and "en carro" (by car) specifies the means of transportation.
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