instruction:
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". 
question:
[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.
answer:
B


question:
[header] How to transport breast milk [title] Ask about the terms of transport. [step] If you are sending your breast milk to a company, such as a breast milk bank, ask in advance about the terms of transport. Questions to ask include : [substeps] When does the milk need to arrive? How long can it take to get there? Does the company accept milk packed with dry ice? If so, in what quantity? [title] Use fresh milk. <sep> (A) [step] Milk is changed on a daily basis. Most manufacturers now sell their new milk cold, rather than reheating it in the microwave. (B) [step] Do not store a whole breast of milk in the microwave. Instead, fill a jug filled with fresh milk and microwave it on high heat for 30 to 60 seconds. (C) [step] You can find fresh milk in some commercial stores in bulk. Be careful of doing so; it may cost a considerable amount of money. (D) [step] If you are going to ship breast milk, make sure it is fresh. Either pump it immediately before mailing, or remove the correct amount from the freezer.
answer:
D


question:
[header] How to take care of a freshwater snail [title] Look for a healthy snail. [step] Signs that your snail is healthy include a clean appearance and healthy coloring. Healthy coloring varies from species to species. <sep> (A) The snail's shell should be free of cracks. Most importantly, the snail should be active and moving about. (B) Seek help by consulting a national pet food service or if you live in a remote area. [title] Provide a wide variety of foods for snail owners. (C) Check for signs of dormancy in females. Observe if they have an inflexible shell. (D) If you see some of the following signs, it may be healthy to use a freshwater snail : [substeps] White coloring whipworms runny droppings even if the snail exhibits a disease [title] Keep the tank warm and dark. [step] Freshwater snails are notoriously cold-blooded.
answer:

A