Which way should you turn your wheels when parked downhill?

When parked downhill, you should turn your wheels towards the curb. This is a safety measure designed to prevent your vehicle from rolling into the street if the parking brake fails. By turning the wheels towards the curb, the front of your vehicle will roll into the curb if it starts to move, effectively stopping it. This practice helps maintain control of the vehicle and minimizes the risk of accidents.

The other choices do not prioritize safety in the same way. Turning away from the curb or keeping the wheels straight would not provide the same level of protection, as it could allow the vehicle to roll into oncoming traffic. Thus, turning your wheels towards the curb is the safest and most responsible action when parking on a downhill slope.