Answer: Nothing more cruel
Step-by-step explanation:
The options include:
A. blew out the light
B. nothing more cruel
C. was no sign
D. with a deep breath
The phrase from the excerpt that most clearly conveys the main characters refusal to let go of her past is "nothing more cruel".
From the excerpt, the speaker states that she was left all alone at the alter and that there was neither the bridegroom nor the priest and she was really sorrowful and said that this was the cruelest thing a person can do.
This shows that she hasn't let go of her past as she compared what happened to what she had gone through in the past and still believes that thus was the worst of them all.