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 protect the copyright of a tv show or movie [title] Confirm that you are the rightful owner of the copyright. [step] Generally you have the right to claim a copyright in your work if you created it--unless it was a work-for-hire. If you were paid to create something for someone else, you can't claim the copyright. <sep> (A) [substeps] If you created your movie or tv show independently, you have a copyright in it. If you accepted funding from someone else or allowed someone else to produce your work, your production contract should state who owns the copyright in the work. (B) However, you must know if you created a work-for-hire from another source. [substeps] Before you do your homework, find out what rights are available to the creator of your television show or movie. (C) [substeps] You generally must prove that you created the work or movie on behalf of someone else--whether you are doing it for a business or company. Generally, you also must prove that the copyright interests the person or company you are seeking the copyright for. (D) However, you may be entitled to a copyright for any work created for another person, including newspapers and magazines. [substeps] In this situation, you may be able to claim something other than a copyright.

Ex Output:
A

Ex Input:
A little boy is climbing up the stairs of a play gym, he stops once and points at a red tube opening but passes it. He gets to the red tube slide at the top and points to it and then slides down. once <sep> (A) he gets to the bottom, he waits, lifts his legs and slides but doesn't slide. (B) on the ground he walks around for a bit then turns around and points up. (C) on, he slides across it and has a great time sliding down. (D) he reaches the bottom, he comes up and grabs the gear that is underneath him and begins to slide back down.

Ex Output:
B

Ex Input:
[header] How to improve your math sat score [title] Download the sat practice app. [step] Go to the college board's website and head to the " daily practice " section. In that area, you will find a link to download an app that will help you prepare for the sat. <sep> (A) The app will send you practice questions each day. It will also let you scan paper practice tests directly into your phone. (B) Select " free practice " from the " start recording " menu. The app will track your transcripts in reverse to help get you out of your " cheat " section and back to working. (C) Under the heading " learning your math skills, " select " help me study for the sat. " from there, you can print out the app and write out your notes once you've installed it. (D) [substeps] The app is free, but can be expensive. It takes some time to install, so if you have trouble getting a perfect sat score, talk to a guidance counselor for help.

Ex Output:
A