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: Consider Input: [header] How to cure swollen gums [title] Talk with your dentist. [step] Make an appointment with your dentist if you notice that your gums are bleeding or irritated throughout the day. You can also bring up this issue with your dentist when you see them every 6 months for a cleaning. <sep> (A) [substeps] You can also get a referral to a dietician who specializes in simply treating swollen gums at home. They may be able to diagnose swollen gums by looking at how your gums feel. (B) You can ask that your dentist discuss all of the possible treatment options with you. [substeps] Your dentist will likely order annual x-rays for you. (C) Dentist visits will help clear up any bleeding and ease your pain. [substeps] Some gums naturally bleed after eating. (D) You might end up visiting your dentist twice a year for repeated cleanings. [title] Avoid gum infections if you suffer from a periodontal disease.

Output: B


Input: Consider Input: A man shows how to change a tube in a tire. he <sep> (A) puts a jack under the tube to lift it up. (B) puts a new tire on the tube. (C) takes the old tube out, puts the new one in, then pumps it up. (D) moves dirt covering the tube.

Output: C


Input: Consider Input: [header] How to catch rabbits [title] Use root vegetables and leafy greens to catch a rabbit. [step] The first step is to make sure you have the right bait on hand. Rabbits are herbivores. <sep> (A) They are used to entering and exiting plant beds as a means to feed. They need clean, leafy greens to digest food and stay fresh in your garden. (B) That means you will have to catch them with plants. [substeps] You could simply figure out which plants the rabbit is taking from your garden, and use those as bait. (C) Most of the time, they will eat anything they think is edible. However, you can also use other plants or fruits as bait. (D) They will hunt for meat, so you should use leafy vegetables such as broccoli and leafy greens. [substeps] Always wait for rabbits to eat everything in its reach: winter meat.


Output: B