Answer:
c. She provides facts, details, and her grandfather's words to develop the central idea.
Step-by-step explanation:
The author provides facts related to her family background. She sets the focus on her Chinese grandfather's life. She gives a detailed description of his arrival in the U.S and the things he did to run his own grocery. While he was trying to have his own business , he met his wife , married and had two children. Her oral history finishes with a quotation from her grandfather:'Everything has been good ......... what else could I ask for?'