Correct answer
A test of exhaled air using a breathalyser.
The breathalyser test is generally carried out by verifying the exhaled air. If the driver disagrees with the result of the test or if a judge so orders, the test may be carried out by means of blood, urine, or other analysis.
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A blood test.
Walking in a straight line.
A test of exhaled air using a breathalyser.
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