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". 

Example Input: A man sits down by the sidewalk playing a guitar. A black man approaches to watch the guitarist perform. a woman <sep> (A) approaches to sing with them and they begin to have a conversation. (B) stands by recording the performer. (C) comes holding a guitar made out of materials. (D) at various functions watches on as the guitarist plays.
Example Output: B

Example Input: [header] How to write a home improvement contract [title] Define what you want to do. [step] You can't write a good contract unless you can define exactly what you want to accomplish. Whether it's a major project like an internal remodel that includes adding rooms or rearranging walls, a new bathroom, or merely adding lighting, you must have a firm grasp on all aspects of the project. <sep> (A) [substeps] A full contract makes certain kinds of health and safety issues more likely. If you try to get your home as good as possible, the other person might skip ahead to any settlement offer. (B) Your objective should be clear from the outset, however. [substeps] Don't wait around for the right time. (C) [substeps] Make sketches or print out photos that closely match what you would like to do. This can help you when selecting a contractor and writing the contract. (D) [substeps] If you need to include a unique color scheme, don't just list and label certain, however. You don't need to thoroughly describe every detail of the project, either.
Example Output: C

Example Input: People are seen walking around a neighborhood with some walking dogs. A young girl walks a dog around the area. another man <sep> (A) walks on a leash behind the dogs. (B) walks in and out of frame while juggling balls. (C) follows her from behind. (D) walks a horse and leads into credits showing horse grooming tools.
Example Output:
C