Please choose the correct ending to complete the given sentence: Health: [header] How to treat a closed fracture during first aid [title] Restrict the person's movement as much as possible. [step] The first step in providing first aid is to prevent the injured person from moving. Ask them to sit or lie still, and try to make them as comfortable as possible.

Ending1: [substeps] This is especially important if they feel any pain in their neck, as moving them could cause serious injury to their spine. Call an ambulance if you suspect there may be injury to the spine. Ending2: Try to keep the individual from moving too slowly, as this can aggravate the injury and make it more difficult to help them move. [substeps] If the injured person is sitting or lying down, keep both of them immobilized as much as possible, with the injured person in a seat or on the ground. Ending3: Keep a scarf or warm blanket in the person's area, and help them feel secure if you find yourself reaching for them. [substeps] If they're in a tub or bathtub, making sure that the water is turned to the point they aren't able to move can help limit their movement. Ending4: [substeps] Make sure the person stays sitting and does not move around so much that it is uncomfortable for the injured person. Alternately, encourage them to lie down, with their upper body tilted sideways so that the blood flow to their upper extremities is slowed.

Answer format: ending1/ending2/ending3/ending4