What action must a driver take if there is no curb while parking on an uphill grade?

Answer: B — Turn the wheels to the right

When parking on an uphill grade without a curb, a driver should turn the wheels to the right. This action is important for safety; it ensures that if the vehicle were to roll, it would roll off the road rather than into traffic. By turning the wheels toward the side of the road, the vehicle is effectively positioned to come to a stop against the road's edge if it moves. In the absence of a curb, this practice becomes especially crucial as there is no additional barrier to prevent the vehicle from rolling away. Therefore, turning the wheels to the right creates a safeguard against potential accidents, enhancing both the driver's safety and that of others on the road. While turning the wheels to the left might be appropriate if there were a curb, in this scenario, it would lead to the vehicle rolling into the street. Leaving the vehicle in neutral would pose significant risks since it could roll forward or backward uncontrollably. Activating hazard lights is a good safety measure in many situations, but it does not serve the critical purpose of securing the vehicle itself when parked on an incline.