an intro for what? you didn't explain fully.
<em>Some</em><em> </em><em>of</em><em> </em><em>them</em><em> </em><em>are</em><em> </em><em>rectriangle</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>
The correct answer is C: He is able to show the banker's worries about his possible defeat by the lawyer.
The tale is told using the third person limited point of view. This means that we have a narrator that is external to the action of the story, but who follows it from the perspective of one of the characters alone.
The use of the third-person limited point of view allows Chekhov to share with the readers the banker's reasons for wishing to kill the lawyer.
I think is C hopes these helps :)