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". 

Example Input: [header] How to avoid the stomach flu [title] Wash your hands often. [step] Wash your hands carefully with soap and water for at least 20 seconds. Always wash your hands after going to the washroom and before and after handling food and eating. <sep> (A) Washing your hands is important, since if the way you handle and eat is bad (germs, bacteria, etc. ), your best chance at preventing the flu is by keeping your hands clean. (B) Don't attempt to dry or clean your hands on something other than a business table. [title] Wear long pants (not utility pants to wear running shoes with). (C) [substeps] It's a good idea to wash your hands between-and as many times as you go to the bathroom. This will help prevent an episode of nausea in the future, as well as allow your body time to shut down its internal defenses to fight off food, germs, and viruses. (D) This will help to prevent the spread of germs. Germs on your hands can get into your eyes, ears, and nose and make you sick.
Example Output: D

Example Input: [header] How to be a bondi lifeguard [title] Contact a surf life saving club in or close to bondi. [substeps] Just about anyone can volunteer to be a lifesaver at sydney surf life saving clubs. Surf clubs will be happy to chat to you and tell you what is required if you want to be a volunteer lifeguard. <sep> (A) [title] Find the best and safest surf-life saving club in your area. [substeps] Surf lifeguards live off the beach, and they will probably need two-way water transportation, quite possibly a car or bicycle. (B) Many will provide all the training you'll need. Call them, check out their websites or simply head down and chat to them. (C) This can be achieved by attending the lifesaving club on the first day, then going on to other lifeguard's clubs along the way. If there are lifeguards at any of their lifesaving clubs, talk with one of those lifeguards. (D) This is the only legal aspect of volunteering. They will be able to suggest hours of work that are perfect for you or your specific lifeguard job.
Example Output: B

Example Input: [header] How to make fun of others [title] Be sarcastic. [step] Nothing cuts to it quicker than a good sarcastic tone of voice. Using sarcasm implies that the other person is stupid just for asking a reasonable question, and it's usually pretty easy to pull off every now and then. <sep> (A) It's a funny and light way to make fun of someone. [substeps] Say the opposite of what you mean when someone asks you a specific question: " yeah, i aced that test. (B) [substeps] Sometimes joking with someone; whether they're really stupid or not, it can be mildly annoying. Picking on someone you don't like, or even calling them names is a good way to provoke some pointless banter with others. (C) Moreover, try to avoid using such sarcasm in social situations-perhaps even at a child's birthday party. You can also build up to more of a negative tone of voice. (D) [substeps] Remember that sarcasm isn't something to joke about, however. Saying something sarcastic is just like any other kind of joke.
Example Output:
A