Task: Text Completion
Input (English): [header] How to know whether to call the police after a car accident [title] Check yourself and your passengers for injuries. [step] If you are involved in a car accident it can be a painful and traumatic experience. The first thing to do is stop your car. <sep> (A) There are many injuries to everyone including broken bones. Bring your car to a mechanic to tell them whether you need to call the police. (B) Both your car and the person behind you will want to know what happened. [substeps] Drive as if the person was driving, without talking to anyone, if possible. (C) Switch on your hazard lights to alert other drivers to the accident. If signs are posted that state to do so, pull out of the lane of traffic onto the shoulder or emergency lane. (D) This is especially important if you have a broken leg or if you've lost your keys, only minor injuries will require medical attention. Think about whether you or the person you're in the car with are in serious pain or potentially have a broken bone.
Output (English): C