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:
An introduction comes onto the screen for a video about rock climbing and a man introduces what will happen in the video. a men in a blue shirt <sep> (A) is doing a jump and falling off, then he begins to climb along the rock face with another by him. (B) stands behind a rock wall talking. (C) is shown climbing all the way to the top of a rock. (D) and the interviewer is inside of a gate in a park and he begins by jumping up to the top of a roofed wooden fence to do various things.

Ex Output:
C


Ex Input:
A man in yellow glasses takes a drink out of a water bottle. People are running across a finish line of a race. someone <sep> (A) falls back on the sand and gets trampled. (B) puts a medal around another person's neck. (C) crashes into the backstretch lane. (D) holds up crumpled sticky things.

Ex Output:
B


Ex Input:
[header] How to become a psychiatric nurse practitioner [title] Maintain a high gpa in high school. [step] To become a nurse, you'll need to get a college degree. Prepare yourself for college by maintaining your highest possible gpa in high school. <sep> (A) [substeps] If you plan to teach at a high school level, get a gpa about 100% in english, math, and science. If you intend to be a psychiatrist or a part-time nurse, you may want a class test that will include courses in good english and multiple choice questions. (B) Continuing your high school education and completing coursework will help keep your grades high and stay in top shape, which will help you look good as a nurse. If your gpa in high school falls below your desired gpa, contact your teacher or their administration team to inform them of your high gpa levels. (C) Have a strong college major, and pursue a bachelor of science in psychology. [substeps] A high gpa may increase your chances of being a doctor. (D) Take high level math and science courses, and take advanced classes when you can. [substeps] Complete 12th grade level biology, chemistry, and math.

Ex Output:

D