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 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 heat sake [title] Know when to heat sake. [step] Nowadays, premium sake is usually served chilled instead of warm. If you have a less expensive type of sake or simply want to draw out a different dimension of flavor, though, you can try heating it before serving it. <sep> (A) This can be an especially good option for a cold winter day. [substeps] Heat causes the alcohol to vaporize. (B) Always check reviews and cookbooks on quality sake. Always check the character of sake before serving it. (C) That will give you the best desired flavor and no pain or damage to your sake at all. This way, you won't have to adjust the temperature. (D) To work this way, reduce the size of the container or pot of sake. [title] Allow the sake to heat until you notice condensation building up on the outside.

Answer: A


Question: [header] How to choose a short hairstyle as an older woman [title] Decide how short you want to go. [step] Short can mean different things to different people, and the length of your hair can help you decide what cut to go for. For example, pixie cuts are great for women who want extremely short hairstyle while a bob works for those who want a chin-length cut. <sep> (A) What length you want has to do with either your hair or height : [substeps] Your height height. If you want to be younger, stick with half inch hair and half an inch length. (B) You might decide that you want to go : [substeps] Chin-length mouth-length cheek-length eye or ear length pixie cut [title] Define your hair goals. [step] Try to determine why you want a short haircut. (C) Shorter hair tends to look better with longer cuts, so don't buy a bob that looks too short. Stylists must know how to use or talk about shortest cuts. (D) Here are some tips to help get you started : [substeps] It's not recommended that you go too long. Men over 40 can cut right above mid-length.

Answer:
B