Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
Input: [header] How to stop a dry cough at night [title] Stay hydrated even at night. [step] Keep a glass of water by your bedside so you can easily stop a cough if you wake up in the middle of the night. Drinking water can soothe your throat and keep the mucus from thickening in your throat (which causes you to cough). <sep> (A) Make sure you drink plenty of water the night before so that you are comfortable in bed. [substeps] Keep a water bowl filled with ice cubes next to your bed. (B) [substeps] Drinking more water can also help your body to fight off an excessive amount of mucus in your diaphragm, which can put pressure on your cough. Staying hydrated can suppress either bacteria or cause you to cough mucus more quickly. (C) If you need additional tea, you can sip a ginger or peppermint tea. These dissolve quickly in hot water, which can help ease the pain and irritation caused by dry cough. (D) [substeps] You should also be drinking lots of fluids during the day. If you get tired of water, you can drink fruit juices or herbal teas.
Output:
D