What is the safest practice when feeling tired while driving?

Answer: C — Take a short break or rest

Taking a short break or resting is the safest practice when feeling tired while driving. Fatigue has a significant impact on a driver's ability to make quick decisions, react promptly to hazards, and maintain concentration on the road. By choosing to stop and rest, a driver can recharge and restore their focus, which is essential for safe driving. The alternative options highlight ineffective strategies that might compromise safety. Continuing to drive when tired can lead to drowsiness and increased risk of accidents. Opening windows may provide some temporary relief but generally doesn’t address the underlying issue of fatigue. Speeding in an attempt to stay alert can lead to reckless behavior and dangerous situations, as it reduces the driver’s control over the vehicle and increases stopping distances. Hence, taking a break is the most responsible and effective way to enhance safety on the road when tired.