Why does Amy Tan include this anecdote in her memior "Mother Tongue"? "We used a similar routine just 5 days ago, for a situation that was far less humorous. My mother had gone to the hospital for an appointment, to find out about a benign brain tumor a CAT scan had revealed a month ago".
To show the reader how her mother was descriminated against.
To make an emotional appeal the the reader for her mother's failing health.
To provide an example of the limitations of her mother's English.
To help the reader understand what it feels like to live with her mother.