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 know if you have glaucoma [title] Schedule regular eye exams. [step] Open-angle glaucoma leads to the gradual deterioration of your vision over an extended period of time, usually years. Most people suffering from open-angle fail to notice symptoms until the glaucoma is very advanced and nerve damage has occurred. <sep> (A) [substeps] Glaucoma is usually attributed to a condition called retinopausal glaucoma. Doctors often refer patients with retinopausal glaucoma to psychotherapy or therapy. (B) The overall diagnosis is: glaucoma can present in two patterns: primary and secondary. Secondary glaucoma reverses almost any natural condition and the simplest way to identify glaucoma is to get three to four eye exams in a normal week. (C) [substeps] It is important to schedule eye exams every year, especially if you are over the age of 40 or have a family history or glaucoma. Open-angle is the most common type of glaucoma in the united states, affecting over 2 million people. (D) Checking your eye closely is often the first step to identifying the signs of open-angle glaucoma. [substeps] Schedule a yearly eye exam using a variety of tools.

Output: C


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: [header] How to choose the shape of your bridal bouquet [title] Choose a round bouquet for a traditional look. [step] The round bouquet is the oldest and most traditional of all bouquet shapes. It is incredibly versatile, working well with almost all wedding dress styles, brides, settings, and levels of formality. <sep> (A) Bouquets typically come in varying shades of pink, purple, turquoise, red, or or dark reds. The bride and groom can also choose a set of flowers as well. (B) [substeps] It's classic to have a pear-shaped bouquet. Bridal bouquets that are inverted in any one spot do not fit well with a " pear " style bouquet. (C) It can be composed of multiple colors, or a single hue; with uniform flowers, or ones of varying sizes and species. The globular arrangement is easy to make--and cheaper to purchase, and allows for the round shape to be made larger or smaller depending on the bride's needs and preferences. (D) If you want a smaller flower of all things, opt for a long bouquet. [substeps] If you're choosing a bouquet with narrow leaves, opt for a more interesting, distinct shape.


Output: C