Read this excerpt from "Life Without Go-Go Boots" by Barbara Kingsolver and answer the question.

That characterizes my whole uniform, in fact: oversized flannel shirts, jeans or cotton leggings, and cowboy boots when the weather permits.

What does the word uniform suggest about Kingsolver?

She wears a specific outfit so as to be identified as part of a group.
She likes the consistency of wearing the same type of outfit.
She works at a job that requires a particular outfit.
She has many types of clothing in her closet.