What happens next in this paragraph?

How to add personal movies to itunes 
Check the format of the movie file you want to add. 
Itunes only supports the mp4 (m4v) and mov formats. It does not support many popular formats, including avi, mkv, and wmv.
Pick from:
[A]. If your video files are not the proper format, you won't be able to add them to your itunes library. Check your video's format before proceeding..
[B]. Where you use html and compressed text to add movie files is from your idd development. If you want to add videos to your itunes, you would do so with the mp4 (m4v) file..
[C]. Copy a particular movie file onto your itunes library. Skip this step if you have not chosen a movie for which to add title..
[D]. When you make a decision to add a movie to itunes, you'll need to create an account first. Before creating a new account, open itunes and type " general " on the address bar..
[A].