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 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.
[A]: D


[Q]: [header] How to make chickpea chocolate chip cookies [title] Gather your ingredients and supplies. [step] It may seem like a silly step, but if you do this first, it will save you time later and help you get everything done much more quickly. Because everything you need will be in one place, you don't need to waste time rummaging through cupboards. <sep> (A) Once you've compiled your supplies, get down to baking. If you don't have everything in one place, make sure your fridge is large enough to house everything you're going to need. (B) [title] Melt your chocolate chips in the microwave for about 5 minutes. [step] Melt the chips like you usually would. (C) [title] Open the can of chick peas and dump them into your colander or strainer. [step] Rinse them well and place them into the food processor. (D) Try to gather your ingredients and supplies only. If you don't have everything this is likely not for you.
[A]: C


[Q]: [header] How to avoid constipation when taking temodar (temozolomide ) [title] Stay hydrated. [step] Drinking water (and other non-caffeinated liquids) is very important to avoid constipation. Unless your doctor told you to restrict your fluids, regularly drink 8-12 cups daily of fluids like water, decaf tea, warm lemonade, or prune juice. <sep> (A) Water also contains calcium, potassium, and vitamin c. consuming more water can prevent constipation and slowly decrease the likelihood of constipation. (B) You can sip these items without warping your bowels. [title] Take a second to check for constipation. (C) The fluids in these water glasses can help to prevent constipation and keep your esophagus and your intestines hydrated. [title] Replace the capsules every 2 weeks. (D) Water can also help flush out excess toxins from chemotherapy. [substeps] Aim to drink 2-3 quarts of fluid every 24 hours.
[A]:
D