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 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.

Ex Output:
C


Ex Input:
A girl flips and takes her turn then flips out of the center. A teen does a flip to the other side of the room. one of the teachers <sep> (A) comes and takes their places. (B) takes her turn next. (C) reaches down to help the girl who was standing up. (D) moves to the middle of the floor.

Ex Output:
D


Ex Input:
The location changes to in front of a salon. The lady goes into a salon and talks to the receptionist then the camera. the lady <sep> (A) is shown in a salon where she is styling her hair. (B) then takes out a hair dryer and begins drying her hair. (C) flips through a hairstyle book. (D) exits the shop and walks back to the office.

Ex Output:

C