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". 

[header] How to warm a horse's bit [title] Dunk in hot water, then wipe dry. [step] Heat water until it's just begun to steam, then bring it over to the stall in a bucket. Place a safety hook over the bucket and drape the bridle over it, making sure not to let the leather touch the water or the ground. <sep> (A) Dunk the bit for 10-15 seconds in hot water, or 1-2 minutes in lukewarm water. Wipe the bit down with a cloth to dry it. (B) Try to keep your head at least six inches from the water. The halter and bridle should be crimped, not tightened, to avoid fraying. (C) [substeps] You don't want the bridle to get hot. If this happens, you need to bring a band-aid or thick covering of newspaper over the cloth. (D) Smooth out any wrinkles so the bridle stays in place. [substeps] When you go to wash the bridle, look in the mirror to see if it fits.
A

[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.
D

[header] How to ease muscle pain from chikungunya [title] Determine if you have muscle pain. [step] The chikungunya virus is transmitted through the bite of aedes mosquitoes. As the virus enters the body, it runs through the blood vessels. <sep> (A) Aedes mosquitoes, in particular, form large red blood vessels in order to infect the blood, making the blood vessels secrete the virus. Aedes mosquitoes are the largest mosquito in the web and are known to carry the virus through blood more often than other mosquito-infected cells. (B) Under 30% of normal healthcare people have muscle pain, as the virus causes muscle spasms, so only non-fluids such as blood and water are used. [substeps] Unfortunately, there is no current scientific background on chikungunya virus. (C) The virus mainly affects the human endothelial and epithelial cells known as fibroblasts. These fibroblasts usually make up the muscle tissue. (D) During this time, there is a bright red blood blister forming. Because of this, it is rare for an adult male to have ketoacidosis and ingest the virus.

C