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 use newsjack [title] Sign up. [step] You will need to enter the following information: user name, , password, channel and profile information. [title] Log in using your unique username and password [title] Upload videos. <sep> (A) [step] Upload a youtube video or two to give people a reason to view them. [title] Find users and login to mobile phone and myphone. (B) [step] Since the feature will be the first thing you're going to be looking for, upload videos which you can share on social media and broader platforms. [title] Contact the host if someone doesn't seem to have work? [step] Who is running the office for you right now? You can send messages to other people who use the account. (C) [step] Upload up a video to publish to either channel. Add in a video you want to distribute. (D) [substeps] Browse video files on your pc or mobile phone. ( maximum size is 20 mb) choose a video (wmv, mov, flv , 3gp, avi, mpg and mp4) click open.
A:
D