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". 

Input: Consider Input: [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.

Output: D


Input: Consider Input: A group of people are in a gym playing dodgeball. a logo <sep> (A) appears and clears the tiles. (B) representing dartmouth appears, followed by other words. (C) appears on the screen. (D) shows up with arrows.

Output: C


Input: Consider Input: [header] How to safely use an atm [title] Chose atms that are well-monitored and well-lit. [step] Visit an atm that is in a well-lighted area, or one that is monitored by surveillance cameras or security personnel. This is true of both indoor atms and drive-up atms. <sep> (A) Some atms come with gps enabled; others do not. Try to find atms that are monitored for a fixed number of hours per day or less. (B) If possible, try to use during daylight hours. [substeps] Drive up atms are often safer than walk-up atms because of the privacy and safety of your vehicle and locked doors. (C) While certain uber atms can monitor monitoring, others cannot. Avoid atms that are well-lit so they can track you. (D) They should not be present when you purchase a atm from a store or online. Thieves may steal your atm if a thief is monitoring it.


Output: B