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Estado físico do condutor, alcool, drogas e medicamentos, sinais de obrigaçãoUnder review

On a long journey, it is advisable for the driver to rest:

Question under review

This question hasn't been validated yet, so it doesn't appear in exams and the correct answer isn't shown for now.

AOnly every 4 hours.

BEvery 2 hours.

COnly after having covered the first 400 km.