The sentence which most clearly discusses medium is:
C. Listening to a storyteller is the oldest and purest way to enjoy a tale.
Medium refers to the channel or instrument used for communication. Examples of media are: <u>books, newspapers, radio, TV, etc.</u>
When we tell a story, the most common media used are probably movies (or the physical media where they are shown, such as the TV or the cinema) and books.
However, the oldest medium for telling a story is our own mouths. In other words, a storyteller is also a medium.
Among the options given in the question, letter C is the one that discusses medium when it mentions listening to a storyteller.
Options A, B, and D do mention books and movies, but not as a medium for tellingstories. They discuss those things in a more general way, considering other aspects.
