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 install debian [title] Back up any important files on your computer. [step] Installing debian on your machine will clear your entire hard drive and reformat it, erasing all data in the process. Store your important information on a removable drive before beginning the installation. <sep> (A) [title] Navigate your web browser to the debian website. [step] Debian is distributed through www.debian. (B) [substeps] If you don't own one, ask a sales associate at your bank to store your files in your. Otherwise, you can install them on your own hard drive. (C) [title] If debian has dependency on your operating system in the previous step. [step] Some debian programs allow for debian to be connected to external storage like the usb connector, vertical port or the simplest root driver. (D) [substeps] Make sure to click the " save/install " button right on the back of the removable drive. [title] Locate and modify the " reason for installing debian " website.

Ex Output:
A

Ex Input:
A mini pool table has a set of colorful pool balls set up in the middle in a triangle shape and the white ball is alone. a man <sep> (A) walks into the pool room wearing an orange swimsuit and begins playing with the ball as a lot of people are standing around by the pool. (B) approaches the mini table, touches the white ball and moves it into position to hit it with the pool stick. (C) is talking to the camera and showing various machine that appear to be emergency preoutfits. (D) of average height, wearing a blue shirt and glasses competes pool holding a rubik's cube on his right hand, a current type of swiffer machine machines sitting on a mat with two wheels to help you.

Ex Output:
B

Ex Input:
[header] How to subpoena bank records [title] Obtain the proper subpoena form. [step] A subpoena for records is called a subpoena duces tecum or a subpoena to produce documents. While the words " duces tecum " are often used in state court to tell someone the subpoena is for records, it is not always used. <sep> (A) There are several types of subpoenas that you can use to collect information about the court. [substeps] Directives on a court's website appear immediately after the website at such as: civil procedure oath conference examine file process. (B) In federal court, it is simply called a subpoena to produce documents. Call or visit the court where your case is pending and ask for a subpoena form. (C) The law in most jurisdictions is lower for operating a document through a state. For this reason, the court system for state prosecutor records, which can be found on the internet, can vary from state to state. (D) You will be asked to identify yourself and sign under oath that you are the person requesting the records. Subpoenas generally do not require a written statement or an affidavit of disclosure.

Ex Output:
B