In which of the following situations should you leave more than the recommended two seconds of following distance between you and the car ahead of you?
A mild illness, such as a cold, can affect your ability to drive as it
[A] can affect your reaction time, either by making you drowsy or lowering your general alertness.
[B] could cause you to take medication that could make you more alert.
[C] can affect your reaction time, by increasing your alertness.
[D] could make you drowsy, but you'll be fine as long as you drink coffee.