Please choose the correct ending to complete the given sentence: Health: [header] How to treat chronic sinusitis [title] Drink eight to 10 glasses of water a day. [step] It's important to drink eight to 10 8-ounce glasses of water a day. This keeps the discharge thin and more fluid, making it easier to drain.

Ending1: You can be as sore and inflamed as you want. [substeps] Water keeps your throat and your immune system hydrated. Ending2: [substeps] If you work or school a lot, try to keep your fluid intake regular-especially towards the end of the day. You don't want to get too much or miss out on the fluid. Ending3: Avoid drinking alcohol and caffeine, which could dehydrate you. [substeps] Don't worry if discharge drains down the back of your throat. Ending4: Drinking eight or 10 glasses a day can help to decrease the sweat, water, and blood that are clotting your skin. [substeps] Try to drink between 1500-1800 ounces of water a day.

Answer format: ending1/ending2/ending3/ending4