Final answer:
The safest course of action during a tornado is to find a sturdy building or storm shelter to take cover. Option number d is correct.
Step-by-step explanation:
The safest course of action if you're on the road during a tornado is to find a sturdy building or storm shelter to take cover. Option d) provides the best protection from tornadoes. Tornadoes can cause high winds, flying debris, and potential structural damage, so it is important to seek shelter in a secure location.
Abandoning your vehicle and lying in a ditch (option c) can expose you to the elements and flying debris, while staying in your vehicle and taking shelter under a tree (option b) is not safe as the tree or branches could fall on the vehicle. Driving towards the tornado to get a better view (option a) is extremely dangerous and should never be attempted.