In icy conditions, how much should you increase the following distance by?

Answer: C — 10 times

Driving in icy conditions can greatly affect your vehicle's ability to stop quickly. Therefore, it is important to increase your following distance in order to have enough time to stop safely. Option A, doubling the following distance, may not provide enough time to stop in icy conditions. Option B, increasing the following distance by 5 times, may be too much and could lead to other cars cutting in front of you. Option D, not increasing the following distance at all, would not give you enough time to stop in case of emergency. Option C, increasing the following distance by 10 times, allows for a large enough cushion between you and the car in front of you to ensure safe stopping.