Answer:
The quote from the text that best supports the characterization of Mrs. Mingott as being untraditional is "Very liberal. In my time a cameo set in pearls was thought sufficient."
Step-by-step explanation:
When Mrs, Mingott is talking to Mr.Archer about the engagement and they were looking at the rings she demonstrates that she has an open mind towards some social standards even when her foundation and status are very wells set in tradition and morality, she accepts the changes in the tradition of the ring since she believes the person is the one that gives the ring the importance.