Why does character motivation matter?

a. it affects how characters react to conflict.
b. it determines the syntax of a work of literature.
c. it distracts from the diction in a work of literature.
d. it generates stories that lack a traditional plot.

In chapter 34 of the awakening, how does the author reveal the contrast between arobin’s and robert’s characters? through the dialogue the two men have in the parlor by the different ways edna responds to them by describing them with contrasting language by placing them in opposite corners of the parlor