Final answer:
The relationship between Maggie and her mother in "A good place for Maggie" is developed through discourse in Maggie's letter to her mother, revealing her unhappiness about being left alone often. Option C is correct answer.
Step-by-step explanation:
In the excerpt from "A good place for Maggie" by Ofelia Dumas Lachtman, the author develops the relationship between Maggie and her mother through c) discourse in Maggie's letter to her mother.
This device highlights Maggie's feelings of loneliness as she communicates her unhappiness about being left alone frequently. Through the content of the letter, readers gain insight into the emotional distance and concern that Maggie feels, as well as the relationship dynamics with her mother.
Maggie's letter serves as a focal point for the reader to understand the depth of Maggie's emotions and her longing for a closer connection with her mother.