To maintain a three-second cushion while driving, you should count seconds as you pass a fixed object after the car in front of you passes it. The correct choice from the options given is A, which involves counting 'one thousand one, one thousand two, one thousand three'. This method ensures a safe following distance while driving.
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To calculate a 3-second cushion, you need to:
A. count 1001...1002...1003 ; Hi,