A man is seen speaking to the camera and pointing all around a bike. Several close ups of a bike are shown with a person adjusting the sides with a screwdriver. the person <sep> (A) adjusts more and demonstrates how to properly drive the bike. (B) moves around the bike with it's wheels up slowly. (C) then reinforces a wheel on the bike. (D) continues to check the specs on a bike and ends by laughing and speaking to the camera.
D