The correct answer is The positions of the jurors and the prosecutor and the exchanges between them need to be seen.
The objective of a long camera shot is to induce the feeling on a viewer that they are witnessing a play, with a setting and elements surrounding the characters. This helps the viewer better understand the environment in which the plot revolves.
In the excerpt, the shot allows to understand the positionment of the prosecutors relative to the jurors, but most importantly, it helps the viewer examine the attitudes of the characters involved, as well as their possible future interactions based on this first impression.
As for the rest of the options:
First option: A long shot is not needed to portray solely one character's appareance. A close-up is sufficient for that.
Second option: The negative features of a character are not commonly presented on a first impression, much less during a long shot, where their features can hardly be discerned.
Third Option: The visualization of the whole setting is one the main objectives of a long shot, but the interaction between the characters involved are important as well.