What is the best advice for driving on icy roads?

Choosing to avoid driving on icy roads is indeed the best advice under such conditions. Icy roads significantly reduce traction, making it difficult to control the vehicle and increasing the risk of skidding or losing control. By opting not to drive on these hazardous surfaces, you're prioritizing safety for yourself, your passengers, and other road users.

This strategy helps avoid potentially dangerous situations that could arise from driving — such as accidents due to sliding, inability to stop in time, or unable to navigate turns safely. Recognizing that icy conditions can drastically impair driving ability is vital, and if at all possible, it's best to delay travel until conditions improve.

In contrast, while reducing speed is generally advisable in bad weather, it's important to recognize that driving even slightly below the speed limit on icy roads can still be risky and may not sufficiently mitigate the dangers present. Therefore, A stands out as the most prudent course of action.