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". 

[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.
C

As he continues to play, he grabs a black cloth and unfolds it over the drums to create a different sound. during the performance <sep> (A) , many photographers come on stage to film the guy until he finishes and the crowd gives him a standing ovation. (B) , the guitarist does his blower as he also plays his guitar. (C) , his face becomes agitated and there are spots of blood color visible. (D) he removes sealing tape from his drums and adds several other pieces to the same hole to finish the song.
A

[header] How to buy clothes for children [title] Look for high quality fabrics. [step] Children are very active, and need clothing that is relatively durable, especially for daily use. However, clothing made of good quality fabrics doesn't have to be expensive, and expensive clothing isn't necessarily made of good quality fabrics. <sep> (A) Without quality materials, you run the risk of polluting children's bodies. [substeps] Companies selling clothing made of good quality tend to produce clothing made of resistant materials, especially polyester. (B) Go for a plain, cotton or linen coat that is soft and clean. The important thing is that it has a good texture-don't buy a sweater made of spotted nylon or a denim coat. (C) [substeps] Go for a nylon or cotton shelf-top shirt made from durable polyester or even bubble-gum. It's cute and easy to get in and out of. (D) Examine each article of clothing to determine fabric quality. [substeps] Feel the fabric to make sure it is thick and durable.

D