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". 

[EX Q]: [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.
[EX A]: C

[EX Q]: [header] How to care for hair between salon trips [title] Buy a deep conditioner. [step] You probably already have shampoo and conditioner. The conditioner you use regularly does condition your hair as thoroughly as a deep conditioner. <sep> (A) A deep conditioner will make your hair appear softer, shiner, and healthier. It should only be used once a week. (B) However, you're willing to risk starting your hair oily or looking like a buck without a deep conditioner. Look for a deep conditioner made specifically for you hair at your local salon. (C) But you don't want to purchase a deep conditioner as any hair at all. Invest in a deep conditioner and make sure you use it daily. (D) Choose a deep conditioner, spritz it on your hair, then shampoo, then blow dry. You can simply apply the deep conditioner once a day and then continue rinsing to replace it over time.
[EX A]: A

[EX Q]: [header] How to measure and buy the correct bike [title] Buy a road bike if you plan to ride primarily on pavement. [step] There are a lot of different types of road bikes available for different styles and functions. They are all, however, made for generally even, hard terrain like city roads or smooth trails. <sep> (A) [substeps] Know your model before buying a bike if you want to avoid looking for a new one. Buy an off-road bike because that's what the bicycle pack includes, rather than a road bike you'll need right on the spot. (B) The most popular choice is a road bike-a road bike with a sturdy and narrow rear (linear) seat. Bike versions are equivalent to a classroom class bike, but they also come with the upper frame to simulate conditions. (C) They are the most common bikes out there, and can be broken up into a few subcategories : [substeps] Racing/road bikes: aerodynamic, fast, and light, these bikes are the most common road warriors. They have thin tires and lighter frames, and usually aren't made to carry extra weight. (D) Other options include river-track sites, stream-pool sites, and creek track. [substeps] Even if you will not ride on a road or stream, if you or your friends have an mi bike or other important bike element, buying a road bike makes the process much more as well.
[EX A]:
C