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". 

[Q]: [header] How to band a goat [title] Purchase an elastrator from a farm and ranch supply store. [step] It is a metal tool that is used to secure the rubber band around the scrotum. [title] Buy castration bands. <sep> (A) [step] They can be purchased from your local farm supply store or from a municipal livestock supply store. [title] Buy a leather or gauze band. (B) [step] Don't use household office supplies for banding. The bands should be thick enough and tight enough to lead to castration within a few weeks. (C) [step] These are simple, metal with metal screws, two prongs, and a ribbon loop on either end. [title] Cut a small hole in each long length of the band. (D) [step] It is a device that attaches the separate rubber bands, wires, tubing and pieces of cork/plastic. It is available at local farm supply stores, ranch supply stores and hardware stores.
[A]: B


[Q]: [header] How to have healthy kidneys [title] Stay hydrated. [step] Staying properly hydrated is one of the best ways to keep your kidneys healthy. Without adequate water, your kidneys can lose some of their ability to filter your blood, and may even become damaged over the course of your lifetime. <sep> (A) [substeps] Drinking water helps your kidneys flush sodium, urea, toxins, and waste out of your body. By staying properly hydrated, you can significantly reduce your risk of developing chronic kidney disease. (B) Aim to drink at least 8 fluid ounces of water every day. This will help reduce any additional fluid or waste in your system and will also allow you to more easily relieve the symptoms of kidney problems. (C) Insufficient water will contribute to poor kidney function, such as kidney failure and rheumatoid arthritis. Trying to drink water with no filter might cause further kidney damage. (D) [substeps] The best amount of water recommended by experts is 1 gallon a day (2.5 liters) each. Drink bottled water, but you don't need soda, fruit juices, or other non-carbonated beverages; opt for bottled water.
[A]: A


[Q]: [header] How to groom a greater swiss mountain dog [title] Remove any obstructions. [step] When you're getting ready to brush your dog, make sure they do not have their collar or any other accessories on. [title] Take them outdoors if weather permits. <sep> (A) [step] Swiss mountain dogs benefit from the fresh air outside, so if it is too cold or snowing, try to take them out into a sheltered area for the day. [substeps] During the winter, you may want to take them into the woods. (B) [step] Whenever possible, take your dog outside before a big event. During peak periods, your dog is likely to be exposed to a lot of sun or heat and can easily become overheated even during the summer when temperatures are extremely hot. (C) [step] Do not take your dog in a park or in a wooded area. There is no need to brush their fur unless you are trained or have a cat. (D) [step] Greater swiss mountain dogs are a very large breed and can shed a lot during certain periods of the year. Plan to brush them outdoors, or in an indoor area that is easy to sweep, like a tile or hardwood floor.
[A]:
D