Answer:
Subconscious
Explanation:
A subconscious social commentary is when a writer refers to a problem that is caused by a social custom, but doesn't challenge this costume in an explicit way. In the given passage from "On Making an Agreeable Marriage" by Jane Austen, she points out a problem for Fanny, and she knows it is caused by the social customs for dating, but she doesn't say it to not challenge these customs.
What are we answering here there is no question or thing to do?
The linking verb is "could have"