The details show that the old lady was the mother's patient, as shown in option C.
We can identify who the old lady is by her intimacy with the narrator of the story. This is because the narration is done from a first-person point of view, which allows the reader to better understand the intimacy and kinship between the characters.
Learn more about the first-person point of view at the link:
https://brainly.com/question/13845140
#SPJ1