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 tell if a cat has a sore throat [title] Notice a change in the cat's meow. [step] Your cat's meow can help you determine if they have a sore throat. Listen to them when they meow. <sep> (A) You will notice different tones of their meow in different environments. [substeps] A cat with sore throat may meow intensely or complain loudly. (B) Their meow might sound quieter, raspier, or thinner than usual. If there is a change in the way the meow sounds or a noticeable difference in the way the cat sounds, it might point to a sore throat. (C) Cats meow every time they've got a sore throat, at least once or twice a day. You might hear this meow a lot. (D) If they do meow, then your cat has a sore throat. [substeps] Cats meow because they are in pain.
Example Output: B

Example Input: [header] How to clean rubber boots [title] Wipe away light dirt and grime. [step] If your boots aren't especially dirty, you can usually clean them easily with a damp cloth. To prevent dirtiness from building up on your boots and causing longer cleaning times, do this after each time you use your boots. <sep> (A) Before handling an object or stepping on something wet, make sure you wipe it away on a rag first. Use a mild soap and water to wipe off even the smallest traces of dirt. (B) [substeps] To increase the dirt fighting potential of your damp cloth, mix 1 tsp (5 ml) of dish soap with a gallon (1 l) of water. Douse your rag in this, and wipe down the boots. (C) [title] Grind three pounds (177 g) of dry powder on a coffee grinder. [step] The dry powder will help to transfer dirt and dust to the boots. (D) This will clear little dirt and grime off of your boots, leaving them looking brand new. [substeps] If your boots are already cleaned, you may need to consult a shoe store or partner to inspect them for a better cleaner.
Example Output: B

Example Input: A kayak rider drifts in the bay of an ocean. two kayak riders <sep> (A) get out of a container and paddle toward a shoreline area. (B) talk while sitting in their kayaks. (C) slide down a hillside next to each other. (D) stand in the water.
Example Output:
B