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]: A man wearing grey shorts kneels down on a carpeted floor and begins stretching. The man moves his right leg under his hip and in front of his left knee. the man <sep> (A) continues exercising his left leg. (B) is then sitting while he's exercising and putting a harness. (C) then begins looking comfortable about doing this and stretches. (D) begins to rock back and forth in a slow movement as he stretches.
[A]: D


[Q]: A little boy is inside a garage room. he <sep> (A) is using a can of hairspray and weaning his hair. (B) 's trying to play dodgeball with another man sitting on the ground. (C) is playing a large drum set while wearing headphones. (D) has several colored hoses attached to him by a machine.
[A]:
C