Please choose the correct ending to complete the given sentence: Health: [header] How to smile with braces [title] Exercise your smile. [step] The best way to grow comfortable with smiling while wearing braces is to practice. Your facial expressions rely on a series of muscles in your face, so " exercising " your smile in front of a mirror can help you find a smile range that you're comfortable with.

Ending1: [substeps] Stretch the corners of your mouth outward, keeping your lips closed. Hold that pose for 10 seconds, then release it. Ending2: [substeps] Learn the ins and outs of smiling. You can find videos online, or meet your doctor and have them show you how to do some basic smiles. Ending3: Here are some examples of exercises you can try to build up your smile while wearing braces : [substeps] Smile with your mouth open slowly rise up into a sitting posture. Pull your cheeks down toward your chin and lick your lips. Ending4: At the same time, try to keep your lips in a neutral position and breathe deeply from your diaphragm, then reward yourself when you get a smile. [substeps] General exercise will help with that too.

Answer format: ending1/ending2/ending3/ending4