The author uses the word "glass" in paragraph 8 as a metaphor to show her extreme physical agony.
What is a metaphor?
As a figure of speech, a metaphor is used to make a comparison between two things that are not alike but have something in common.
Hence, she uses the "glass" in paragraph 8 as a metaphor to show her extreme physical agony.
Therefore, the Option D is correct.
Read more about metaphor
brainly.com/question/9418370
