Which of the following describe video dynamics as processed through a videoconference system?

[answerhappygod]

Which of the following describe video dynamics as processed through a videoconference system?

A. Cameras react to light the same as ones eye and video monitors accurately render the video information so what one sees by eye is what the far-end sees.
B. Cameras have limits to the range of light levels which can be accommodated and tend to process the darker regions further toward black than what ones eye sees.
C. Codecs have the same limits as cameras and therefore will not change the perceived qualities of the video as rendered by the cameras.
D. Codecs have more restrictive limits than cameras, and the best way to accurately assess the video quality sent to the far-end is to view a video scene fully coded and then decoded.