Please choose the correct ending to complete the given sentence: Health: [header] How to react in an emergency [title] Remain calm. [step] Take a few deep breaths. This is mentioned in every article with the word " emergency " in it and it is necessary to properly deal with an emergency.

Ending1: Breathing properly is the key to stopping a car wreck. [substeps] Do not get impatient and use short choppy breaths. Ending2: [title] Remember, this is a family emergency, and never interrupt your siblings if an emergency is required. [step] These are your family's cvs and need you, not your parents. Ending3: [title] Keep people away from the site of the situation. [step] This will keep the people involved/injured safe. Ending4: [title] Notice the reaction as briefly as possible. [step] Non-passengers or single users can react in any way but cars should plan ahead because they might cause a panic, which should be avoided if possible.

Answer format: ending1/ending2/ending3/ending4