Final answer:
To prevent drowsiness on long trips, the most effective method is stopping at regular intervals for a rest. It's also vital to get adequate sleep regularly, especially before a long drive, as sleep deprivation can severely impact mental and motor functions.
Step-by-step explanation:
To prevent drowsiness on long trips, the most effective strategy is A. Stopping at regular intervals for a rest. This helps by breaking up the drive, allowing you to stretch, move around, and refresh yourself before continuing on the journey. Rest is critical as it helps to recharge your body and mind, making you more alert and reducing the risk of drowsiness-related accidents. Other important considerations for preventing drowsiness include maintaining a regular sleep schedule and ensuring adequate sleep before long drives. Sleep deprivation can impair cognitive and motor functions, similar to the effects of alcohol intoxication. Ensuring a cool bedroom temperature and avoiding stimulants before bedtime can also contribute to better quality sleep.