Lin produces a video of herself singing a song that John wrote, and uploads it to YouTube. Which of the following is true?

Lin owns the rights to the music video and sound recording, but John owns the rights to the underlying musical composition.
Lin owns the rights to all of the content in the video because it’s a derivative work.
John owns the rights to all of the content in the video because it wouldn’t exist without the song he wrote.
Lin owns the rights to the sound recording only. John owns the rights to the musical composition and the video.

The correct answer is:

Lin owns the rights to the music video and sound recording, but John owns the rights to the underlying musical composition.