Read this passage from Sister Carrie by Theodore Dreiser. When Caroline Meeber boarded the afternoon train for Chicago, her total outfit consisted of a small trunk, a cheap imitation alligator-skin
satchel, a small lunch in a paper box, and a yellow leather snap purse, containing her ticket, a scrap of paper with her sister's address in Van Buren
Street, and four dollars in money. It was in August, 1889. She was eighteen years of age, bright, timid, and full of the illusions of ignorance and
youth. Whatever touch of regret at parting characterised her thoughts, it was certainly not for advantages now being given up. A gush of tears at her
mother's farewell kiss, a touch in her throat when the cars clacked by the flour mill where her father worked by the day, a pathetic sigh as the
familiar green environs of the village passed in review, and the threads which bound her so lightly to girlhood and home were irretrievably broken.

This passage would fit into the plot structure as
1. part of the climax.
2. part of the exposition.
3. part of the denouement.
4. part of the rising action.