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".

[Q]: [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.
[A]: A

[Q]: [header] How to use memes on facebook [title] Log into your facebook account. [step] Go to facebook, and if you're not logged in yet, enter your registered email address, or username, and password in the top right fields. Click " log in " to continue. <sep> (A) [title] See all the memes in the top left section. [step] The memes you want to edit are listed below. (B) [title] Use the appropriate heading to search for memes. [step] In the upper-right corner of the page, you'll see a drop-down menu. (C) [title] Click the update status box at the top of the page. [step] There's an update status box at the top of your facebook news feed and timeline. (D) [substeps] If you haven't signed in yet, you'll need to give the sign in process a shot. Click the " sign in " button in the upper-right corner of the screen.
[A]: C

[Q]: [header] How to get nice feet [title] Remove callouses and rough skin. [step] Feet often end up calloused or rough with time. If you want to improve your feet, you can smooth out your skin using an electronic callous remover, a foot file, or a pumice stone. <sep> (A) Nail files, while softer pads help soften the calluses faster, are hard to get rid of. [substeps] Get rid of callouses without an electronic callous remover by scrubbing them with talcum powder. (B) Use a pumice stone to buff away calluses and rough areas. [substeps] Dry, uncalloused feet are usually less painful than calloused feet, but their callouses are still too hard to remove. (C) [substeps] An electronic callous remover is a motorized device that you move over callouses and rough spots on the feet. It removes dead skin cells and shaves down the rough, outer layer of skin and leaves your feet smooth. (D) Stick the stone under the skin for the first 2 or 3 months. Then slowly work the callous away with moderate discomfort.
[A]:
C