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". 

[header] How to watch youtube offline [title] Navigate to the youtube video you want to watch offline at a later date. [title] Copy the url for the youtube video that is displayed in your browser's address bar. [title] Navigate to the keepvid website at www. <sep> (A) [step] Find the video that displays with the " pages " option, then copy the url of the video. Repeat until you get to the page that displays. (B) [title] Paste the url for the youtube video into the box at the top of your keepvid session. [title] Click on " download " to the right of the url box. (C) [step] You'll find this link on the website: https: // www.youtube.com/watch/youtube.com/watch-youtube-videos [title] Ensure that your watching account is authorized. [substeps] Click the " account " button in the upper-right corner of the page to confirm that it's authorized. (D) [step] Https: // tts.youtube.com/watch. [title] Select the video that you would like to see to watch videos at.
B