Please choose the correct ending to complete the given sentence: Health: [header] How to treat anterior cruciate ligament (acl) tears [title] Rest your knee. [step] Start by sitting down to take any weight off of your knee. Sit on a comfortable chair or lie down with your knee elevated above your waist on a pillow or another, higher chair.

Ending1: Elevating your knee will help the swelling to go down. [substeps] Try not to move your knee at all or be up on your feet. Ending2: [substeps] Resting your knee supports the ligament pressure, and also lowers the blood vessels in the injured ligament. This will reduce risk of developing plantar fasciitis by the degree of swelling and pressure. Ending3: Your knees should be approximately level with your pelvis. This will give you some protection from any damages that you can develop from an acl tear. Ending4: [substeps] Keep your knee stacked on your back, and try resting it to prevent the tissues from softening up when new ligaments are installed. Excessive stress or pressure can cause anterior cruciate ligament tears to tear apart quickly, resulting in a hard, white tear.

Answer format: ending1/ending2/ending3/ending4