Respuesta :
The video best extended option (b) or (ii) which clearly explains how Dr. Dowell does his work.
What does the video best extend to?
A video might be used to demonstrate how disease investigators take care to keep themselves safe while on the job. What Dr. Dowell does for a living may be stated in the video.
Therefore, option (b) is the correct answer.
For more information about the video, refer below
https://brainly.com/question/27247479