A customer is complaining that they can see black bars to the sides of their widescreen TV screen when watching some channels. Which of the following is the MOST likely cause of this problem?

A.
The aspect ratio of the content being broadcast is not 16:9.

B.
The aspect ratio of the content being broadcast is not 4:3.

C.
The image needs to be stretched to fill the screen.

D.
The screen needs to have correct convergence settings.