What should you do to the engines of the cars in a collision when you reach them?

1. 1Start them to move the cars away
2. 2Leave them running to keep people warm
3. 3Open the hoods to let the heat out
4. 4Turn off the ignitions to lower fire risk

Source: Prince Edward Island Driver's Handbook (revised spring 2011), Chapter 8, At the collision scene, page 179