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 stay young [title] Challenge yourself to try new things. [step] Go out dancing, joining a book club or a hiking club, or try out for a community chorus. Singing, dancing, and finding new ways to stay active all contribute towards keeping a youthful outlook on life. <sep> (A) Here are some things to take into account : [substeps] Spend less time studying or practicing. Read only the books you are interested in, do not read video games, and do not browse old magazines or websites. (B) [substeps] Don't be afraid to laugh at yourself. Trying new things with joyfulness raises your levels of dopamine and energy levels. (C) [substeps] Try a fun game like punch or catch. Then, in the morning, you'll feel fresh and energized, and all your racing thoughts will be washed away. (D) If you can, challenge yourself to put in hours or weeks into each of these activities. Try hard but don't give up if you cannot help someone in need.
Example Output: B

Example Input: [header] How to make healthy mashed potatoes [title] Wash and cut the potatoes. [step] Wash 1 1/4 pounds (567 g) of your potatoes. You can also use a mix of potatoes and root vegetables for a variety of nutrients. <sep> (A) You can discard the peels, pits, and skins to make only healthy mashed potatoes. [substeps] The mashed potatoes will have a mildly sour texture after this step. (B) Leave the skin on the vegetables and cut them into 1-inch (2.5 cm) pieces. [substeps] Ensure that the pieces are the same size, so they cook evenly. (C) Wash the potatoes out of a colander and rinse them under clean running water. Then rinse each potato under cool, running water for about 5 seconds to remove dirt. (D) Wash the potatoes under hot tap water so they're soft and ready to eat. [substeps] Fresh or frozen mashed potatoes will last 7 to 10 months.
Example Output: B

Example Input: [header] How to care for your dog on the beach [title] Find out whether your dog likes to swim. [step] Some breeds are natural born swimmers, like labrador retrievers, while other breeds are less adept in the water. Before you take your dog to the beach, where water conditions will be rougher and less predictable than a pool or shallow pond, you should know your dog's swimming skills. <sep> (A) [substeps] If your dog enjoys swimming but is not a strong swimmer, consider purchasing a dog life vest to help them float. A life vest does not replace supervision and attention. (B) You'll want to teach your dog as much about their swimming as you can in advance. You should also consider if they enjoy the water or just love it. (C) Stay in your house and keep your dog out of one area of your house at all times. Plan on doing some exercise on the way from your house to the beach. (D) [substeps] There are fish repellent materials offered by dog shops such as sodium milli2peat. If you have been meaning to become a health guard, talk to your vet.
Example Output:
A