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 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 ¼ 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.
answer:
B


question:
[header] How to get rid of migraines [title] Learn all you can about migraines. [step] Nobody knows exactly what causes migraines. A lot of research has gone into the exact cause of migraines, but with little success. <sep> (A) People who experience migraines regularly have been having regular consultations with doctors and they still don't know what is causing them. Anything you experience requires some much-needed research or hypnosis to rule out any medical issues or underlying conditions. (B) Migraines result from a lack of sensory focal points or groups. They occur in fewer than three brain groups. (C) Just finding out what causes them will give you some tips on dealing with them. [substeps] Most people develop migraines because they have no symptoms or aren't able to respond to stimuli. (D) It is generally agreed upon that the trigeminal nerve plays a role in migraine pain. The trigeminal nerve is a cranial nerve that facilitates a major pain pathway.
answer:
D


question:
[header] How to save money for something big as a teen [title] Decide on what you want to get. [step] Find out the pricing. The best idea is to do a little research and compare prices online so that you get the best deal possible. <sep> (A) Or you could try contacting other parents and asking questions. What one parent got for cash? How many tickets is a fun event? You can add in some new clothes, changes of clothes, either sport equipment or other " save offs. (B) You'll also want to be clear about the value of the things you want to spend to get the best deal. If the item you're going to spend the minimum amount of money on has high price limits, think about investing in multiple high-end items as this will save you money. (C) [title] Set aside half of all funds received. [step] Open a savings account or put it in a money box. (D) Not only will you spend more on supplies, but it will also give you an idea of what you need to start saving. [title] Figure out what sort of clothes you're most comfortable in.
answer:

C