How does the author develop the viewpoint of the narrator in "all summer in a day"?

First.

A Showing the children locking Margot in the closet reveals the narrator's uncaring attitude toward the girl.

B Explaining that after an hour in the sun the rain begins to pour again shows the narrator's sympathy for the children.

C Describing how the children tease Margot, shows the bias the narrator feels toward the children.  

D Describing the delight the children feel while  playing in the sunshine shows the narrator's envy of their experience.

Second i think it might be D but im not sure

to persuade readers which is answer c